Synthetic steganography: Methods for generating and detecting covert channels in generated media

Issues of privacy in communication are becoming increasingly important. For many people and businesses, the use of strong cryptographic protocols is sufficient to protect their communications. However, the overt use of strong cryptography may be prohibited or individual entities may be prohibited from communicating directly. In these cases, a secure alternative to the overt use of strong cryptography is required. One promising alternative is to hide the use of cryptography by transforming ciphertext into innocuous-seeming messages to be transmitted in the clear. ^ In this dissertation, we consider the problem of synthetic steganography: generating and detecting covert channels in generated media. We start by demonstrating how to generate synthetic time series data that not only mimic an authentic source of the data, but also hide data at any of several different locations in the reversible generation process. We then design a steganographic context-sensitive tiling system capable of hiding secret data in a variety of procedurally-generated multimedia objects. Next, we show how to securely hide data in the structure of a Huffman tree without affecting the length of the codes. Next, we present a method for hiding data in Sudoku puzzles, both in the solved board and the clue configuration. Finally, we present a general framework for exploiting steganographic capacity in structured interactions like online multiplayer games, network protocols, auctions, and negotiations. Recognizing that structured interactions represent a vast field of novel media for steganography, we also design and implement an open-source extensible software testbed for analyzing steganographic interactions and use it to measure the steganographic capacity of several classic games. ^ We analyze the steganographic capacity and security of each method that we present and show that existing steganalysis techniques cannot accurately detect the usage of the covert channels. We develop targeted steganalysis techniques which improve detection accuracy and then use the insights gained from those methods to improve the security of the steganographic systems. We find that secure synthetic steganography, and accurate steganalysis thereof, depends on having access to an accurate model of the cover media

DigBuild: Sandbox Voxel Game and Engine Using Vulkan

Trabajo de Fin de Grado. Grado en Ingeniería Informática. Curso académico 2020-2021[EN]Sandbox voxel games provide players with an interesting challenge while at the same time giving them lots of freedom to do what they want. However, a lot of these games have very locked featuresets and require tooling created by the community to expand on this content. This often means extracting, modifying and deobfuscating binaries to be able to add hooks and events, and results in major breaking changes every time the game is updated. The goal of this project is to develop one such game, but placing the focus on creating simple yet flexible APIs that are designed for third parties to use. The game’s own content should also make use of these APIs to prove that they are in fact usable. The move to modern graphics APIs has been very slow, and very few of these games support them, with most focusing on OpenGL and maybe DirectX 11. They are often limited to specific platforms as well, reducing the pool of players they could draw attention from. One of the core objectives is to support Vulkan, a next generation rendering API with a focus on performance and optimization. It is however important not to rely on it directly, and allow for other rendering APIs to be used depending on the context, such as in other platforms.[ES]Los juegos sandbox voxel ofrecen a los jugadores un reto interesante y a la vez les dan gran cantidad de libertad para hacer lo que quieran. Aún así, muchos de esos juegos tienen unas características y mecánicas muy limitadas y requieren herramientas creadas por la comunidad para expandir este contenido. Eso suele llevar a la extracción, modificación y deobfuscación de binarios para poder añadir hooks y eventos, y resulta en grandes cambios cada vez que el juego es actualizado. El objetivo de este proyecto es desarrollar un juego en ese género, pero con un enfoque a la creación de APIs sencillas pero flexibles diseñadas para el uso por vi terceros. Además, el contenido del propio juego debería ser añadido usando estas APIs para demostrar su utilidad. La transición a APIs gráficas modernas ha sido lenta, y muy pocos de estos juegos son compatibles con ellas, la mayoría usando OpenGL o DirectX 11. Suelen también estar limitados a plataformas específicas, limitando el número de jugadores que pueden atraer. Uno de los objetivos principales es tener compatibilidad con Vulkan, una API de nueva generación centrada en velocidad y optimización. Aún así, es importante no depender de ella y permitir que se usen otras APIs en su lugar dependiendo del contexto, como en otras plataformas

Videopelit ja pukutaide - analogisten pukusuunnittelumetodien digitalisointi

This thesis explores ways of integrating a costume professional to the character art team in the game industry. The research suggests, that integrating costume knowledge into the character design pipeline increases the storytelling value of the characters and provides tools for the narrative. The exploration of integrating a costume professional into game character creation as a process is still rare and little information of costume in games and experiences in transferring an analogue character building skillset into a digital one can be found, therefore this research was generated to provide knowledge on the subject. The research's main emphasis is on immersion-driven AAA-games that employ 3D-graphics and human characters and are either photorealistic or represent stylized realism. Technology for depicting reality is advancing and digital industries have become aware of the extensive skills required to depict increasingly realistic worlds. Also, tools for character art are beginning to lean on actual costume construction: the pattern based cloth simulation software entitled Marvelous Designer has become the industry standard for character clothing. The material of this thesis is based on the author's experience as an intern and Costume Artist at the game company Remedy Entertainment and on data collection in the form of participant observation, conversational interviews, archival searches and assorted documents as an internal employee of the company. Therefore, an ethnographical research that applies to qualitative, descriptive, nonmathematical and naturalistic research methods is utilized in this thesis. The result of this research is a costume production pipeline for integrating a costume professional into the game character design process. It is formed by comparing costuming processes of game and film industries to explore the similarities and differences in methods to analyze the most effective combination of these two. The final pipeline introduces the costume professional’s position during the different stages of the character design process. Furthermore, the thesis categorizes aspects essential for a costume designer to internalize in order to become a functional part of the Character Art team and the skills and knowledge required to support the character design in a production. This research identifies the need for costume knowledge in realistic AAA-games. When employing a costume professional into a game production, this thesis offers tools and vocabulary for collaboration. Costume designers are Character Artists, but with different tools and skill set and costume design can be seen as a live form of character art.Tämä opinnäytetyö käsittelee pukusuunnittelua peliteollisuudessa ja pukusuunnittelijan tarvetta hahmosuunnitteluprosessissa. Tutkimuksen materiaali perustuu kirjoittajan omaan kokemukseen harjoittelijana ja pukusuunnittelijana (Costume Artist) Remedy Entertainment -peliyhtiön hahmosuunnittelutiimissä. Työ esittelee eri peliyhtiöiden hahmotiimien käyttämiä pukusuunnittelumetodeja ja arvioi, miten pukusuunnittelun tiedostaminen erillisenä osana hahmosuunnitteluprosessia ja puvun kerronnallisten elementtien tunnistaminen ja hyödyntäminen tukee uskottavan pelihahmon luomista realistisissa peleissä. Tutkimuksen lähtökohtana on ajatus, että pukusuunnittelun integroiminen hahmosuunnitteluprosessiin syventää hahmoa ja kuluttajan pelikokemusta ja näin ollen nostaa pelin arvoa tuotteena. Tutkimuksen tuloksena syntyi uusi pukusuunnittelun tuotantolinja (Costume production pipeline) peliteollisuuden käyttöön. Se esittelee pukusuunnittelijan asemoitumisen pelituotannon hahmosuunnitteluprosessiin. Teknologinen kehitys mahdollistaa yhä realistisempien digitaalisten todellisuuksien luomisen, jonka seurauksena peliteollisuus työllistää enenevässä määrin myös perinteisten alojen erityisosaajia, kuten arkkitehtejä sekä elokuva-alan valosuunnittelijoita. Myös digitaalisen hahmonluonnin työvälineet nojaavat jo tosielämän vaatetuotantoon: vaatesimulaatio-ohjelma Marvelous Designer perustuu vaatteiden kaavoihin ja on laajalti käytössä pelihahmojen suunnittelussa. Pelit, joita tutkimus tarkastelee, ovat AAA-pelejä, jotka hyödyntävät 3D-grafiikkaa ja ihmishahmoja ja jotka ovat joko photorealistisia tai edustavat tyyliteltyä realismia. Tutkimuksen materiaali on koostettu keskustelullisista, strukturoimattomista haastatteluista, kirjoittajan työpäiväkirjasta, yhtiön edellisten pelien arkistomateriaaleista, sekä yhtiön sisäisistä ohjeistuksista. Tutkimus esittelee keinoja, joilla fyysisen ihmisvartalon kanssa työskentelemään kouluttautunut pukusuunnittelija voi integroitua digitaaliseen hahmonluontiprosessiin ja osoittaa, että pukusuunnittelijat ovat analogisilla metodeilla työskenteleviä hahmosuunnittelijoita. Hahmosuunnittelun etu suhteessa esitystaiteen pukusuunnitteluun on vapaus näyttelijän fyysisen ruumiin sekä fysiikan lakien tuottamista rajoitteista. Vaatesuunnittelu keskittyy vaatteeseen ja pukusuunnittelu fyysisen ihmisruumiin ja vaatteen synnyttämään kombinaatioon ja interaktioon, mutta hahmosuunnittelu tarjoaa pukusuunnittelullisesti rajoittamattoman vapauden hahmotulkintaan

Enhancing detailed haptic relief for real-time interaction

The present document exposes a different approach for haptic rendering, defined as the simulation of force interactions to reproduce the sensation of surface relief in dense models. Current research shows open issues in timely haptic interaction involving large meshes, with several problems affecting performance and fidelity, and without a dominant technique to treat these issues properly. Relying in pure geometric collisions when rendering highly dense mesh models (hundreds of thousands of triangles) sensibly degrades haptic rates due to the sheer number of collisions that must be tracked between the mesh's faces and a haptic probe. Several bottlenecks were identified in order to enhance haptic performance: software architecture and data structures, collision detection, and accurate rendering of surface relief. To account for overall software architecture and data structures, it was derived a complete component framework for transforming standalone VR applications into full-fledged multi-threaded Collaborative Virtual Reality Environments (CVREs), after characterizing existing implementations into a feature-rich superset. Enhancements include: a scalable arbitrated peer-to-peer topology for scene sharing; multi-threaded components for graphics rendering, user interaction and network communications; a collaborative user interface model for session handling; and interchangeable user roles with multi-camera perspectives, avatar awareness and shared annotations. We validate the framework by converting the existing ALICE VR Navigator into a complete CVRE, showing good performance in collaborative manipulation of complex models. To specifically address collision detection computation, we derive a conformal algebra treatment for collisions among points, segments, areas, and volumes, based on collision detection in conformal R{4,1} (5D) space, and implemented in GPU for faster parallel queries. Results show orders of magnitude time reductions in collisions computations, allowing interactive rates. Finally, the main core of the research is the haptic rendering of surface mesostructure in large meshes. Initially, a method for surface haptic rendering was proposed, using image-based Hybrid Rugosity Mesostructures (HRMs) of per-face heightfield displacements and normalmaps layered on top of a simpler mesh, adding greater surface detail than actually present. Haptic perception is achieved modulating the haptic probe's force response using the HRM coat. A usability testbed framework was built to measure experimental performance with a common set tests, meshes and HRMs. Trial results show the goodness of the proposed technique, rendering accurate 3D surface detail at high sampling rates. This local per-face method is extended into a fast global approach for haptic rendering, building a mesostructure-based atlas of depth/normal textures (HyRMA), computed out of surface differences of the same mesh object at two different resolutions: original and simplified. For each triangle in the simplified mesh, an irregular prism is considered defined by the triangle's vertices and their normals. This prism completely covers the original mesh relief over the triangle. Depth distances and surfaces normals within each prism are warped from object volume space to orthogonal tangent space, by means of a novel and fast method for computing barycentric coordinates at the prism, and storing normals and relief in a sorted atlas. Haptic rendering is effected by colliding the probe against the atlas, and effecting a modulated force response at the haptic probe. The method is validated numerically, statistically and perceptually in user testing controlled trials, achieving accurate haptic sensation of large meshes' fine features at interactive rendering rates, with some minute loss of mesostructure detail.En aquesta tesi es presenta un novedós enfocament per a la percepció hàptica del relleu de models virtuals complexes mitjançant la simulació de les forces d'interacció entre la superfície i un element de contacte. La proposta contribueix a l'estat de l'art de la recerca en aquesta àrea incrementant l'eficiència i la fidelitat de la interacció hàptica amb grans malles de triangles. La detecció de col·lisions amb malles denses (centenars de milers de triangles) limita la velocitat de resposta hàptica degut al gran nombre d'avaluacions d'intersecció cara-dispositiu hàptic que s'han de realitzar. Es van identificar diferents alternatives per a incrementar el rendiment hàptic: arquitectures de software i estructures de dades específiques, algorismes de detecció de col·lisions i reproducció hàptica de relleu superficial. En aquesta tesi es presenten contribucions en alguns d'aquests aspectes. S'ha proposat una estructura completa de components per a transformar aplicacions de Realitat Virtual en Ambients Col·laboratius de Realitat Virtual (CRVEs) multithread en xarxa. L'arquitectura proposada inclou: una topologia escalable punt a punt per a compartir escenes; components multithread per a visualització gràfica, interacció amb usuaris i comunicació en xarxa; un model d'interfície d'usuari col·laboratiu per a la gestió de sessions; i rols intercanviables de l'usuari amb perspectives de múltiples càmeres, presència d'avatars i anotacions compartides. L'estructura s'ha validat convertint el navegador ALICE en un CVRE completament funcional, mostrant un bon rendiment en la manipulació col·laborativa de models complexes. Per a incrementar l'eficiència del càlcul de col·lisions, s'ha proposat un algorisme que treballa en un espai conforme R{4,1} (5D) que permet detectar col·lisions entre punts, segments, triangles i volums. Aquest algorisme s'ha implementat en GPU per obtenir una execució paral·lela més ràpida. Els resultats mostren reduccions en el temps de càlcul de col·lisions permetent interactivitat. Per a la percepció hàptica de malles complexes que modelen objectes rugosos, s'han proposat diferents algorismes i estructures de dades. Les denominades Mesoestructures Híbrides de Rugositat (HRM) permeten substituir els detalls geomètrics d'una cara (rugositats) per dues textures: de normals i d'alçades. La percepció hàptica s'aconsegueix modulant la força de resposta entre el dispositiu hàptic i la HRM. Els tests per avaluar experimentalment l'eficiència del càlcul de col·lisions i la percepció hàptica utilitzant HRM respecte a modelar les rugositats amb geometria, van mostrar que la tècnica proposada va ser encertada, permetent percebre detalls 3D correctes a altes tases de mostreig. El mètode es va estendre per a representar rugositats d'objectes. Es proposa substituir l'objecte per un model simplificat i un atles de mesoestructures en el que s'usen textures de normals i de relleus (HyRMA). Aquest atles s'obté a partir de la diferència en el detall de la superfície entre dos malles del mateix objecte: l'original i la simplificada. A partir d'un triangle de la malla simplificada es construeix un prisma, definit pels vèrtexs del triangle i les seves normals, que engloba el relleu de la malla original sobre el triangle. Les alçades i normals dins del prisma es transformen des de l'espai de volum a l'espai ortogonal tangent, amb mètode novedós i eficient que calcula les coordenades baricèntriques relatives al prisma, per a guardar el mapa de textures transformat en un atles ordenat. La percepció hàptica s'assoleix detectant les col·lisions entre el dispositiu hàptic i l'atles, i modulant la força de resposta d'acord al resultat de la col·lisió. El mètode s'ha validat numèricament, estadística i perceptual en tests amb usuaris, aconseguint una correcta i interactiva sensació tàctil dels objectes simulats mitjançant la mesoestructura de les mallesEn esta tesis se presenta un enfoque novedoso para la percepción háptica del relieve de modelos virtuales complejos mediante la simulación de las fuerzas de interacción entre la superficie y un elemento de contacto. La propuesta contribuye al estado del arte de investigación en este área incrementando la eficiencia y fidelidad de interacción háptica con grandes mallas de triángulos. La detección de colisiones con mallas geométricas densas (cientos de miles de triángulos) limita la velocidad de respuesta háptica debido al elevado número de evaluaciones de intersección cara-dispositivo háptico que deben realizarse. Se identificaron diferentes alternativas para incrementar el rendimiento háptico: arquitecturas de software y estructuras de datos específicas, algoritmos de detección de colisiones y reproducción háptica de relieve superficial. En esta tesis se presentan contribuciones en algunos de estos aspectos. Se ha propuesto una estructura completa de componentes para transformar aplicaciones aisladas de Realidad Virtual en Ambientes Colaborativos de Realidad Virtual (CRVEs) multithread en red. La arquitectura propuesta incluye: una topología escalable punto a punto para compartir escenas; componentes multithread para visualización gráfica, interacción con usuarios y comunicación en red; un modelo de interfaz de usuario colaborativo para la gestión de sesiones; y roles intercambiables del usuario con perspectivas de múltiples cámaras, presencia de avatares y anotaciones compartidas. La estructura se ha validado convirtiendo el navegador ALICE en un CVRE completamente funcional, mostrando un buen rendimiento en la manipulación colaborativa de modelos complejos. Para incrementar la eficiencia del cálculo de colisiones, se ha propuesto un algoritmo que trabaja en un espacio conforme R4,1 (5D) que permite detectar colisiones entre puntos, segmentos, triángulos y volúmenes. Este algoritmo se ha implementado en GPU a efectos de obtener una ejecución paralelamás rápida. Los resultadosmuestran reducciones en el tiempo de cálculo de colisiones permitiendo respuesta interactiva. Para la percepción háptica de mallas complejas que modelan objetos rugosos, se han propuesto diferentes algoritmos y estructuras de datos. Las denominadasMesoestructuras Híbridas de Rugosidad (HRM) permiten substituir los detalles geométricos de una cara (rugosidades) por una textura de normales y otra de alturas. La percepción háptica se consigue modulando la fuerza de respuesta entre el dispositivo háptico y la HRM. Los tests realizados para evaluar experimentalmente la eficiencia del cálculo de colisiones y la percepción háptica utilizando HRM respecto a modelar las rugosidades con geometría, mostraron que la técnica propuesta fue acertada, permitiendo percibir detalles 3D correctos a altas tasas de muestreo. Este método anterior es extendido a un procedimiento global para representar rugosidades de objetos. Para hacerlo se propone sustituir el objeto por un modelo simplificado y un atlas de mesostructuras usando texturas de normales y relieves (HyRMA). Este atlas se obtiene de la diferencia en detalle de superficie entre dos mallas del mismo objeto: la original y la simplificada. A partir de un triángulo de la malla simplificada se construye un prisma definido por los vértices del triángulo a lo largo de sus normales, que engloba completamente el relieve de la malla original sobre este triángulo. Las alturas y normales dentro de cada prisma se transforman del espacio de volumen al espacio ortoganal tangente, usando un método novedoso y eficiente que calcula las coordenadas baricéntricas relativas a cada prisma para guardar el mapa de texturas transformado en un atlas ordenado. La percepción háptica se consigue detectando directamente las colisiones entre el dispositivo háptico y el atlas, y modulando la fuerza de respuesta de acuerdo al resultado de la colisión. El procedmiento se ha validado numérica, estadística y perceptualmente en ensayos con usuarios, consiguiendo a tasas interactivas la correcta sensación táctil de los objetos simulados mediante la mesoestructura de las mallas, con alguna pérdida muy puntual de detall

A Framework for Dynamic Terrain with Application in Off-road Ground Vehicle Simulations

The dissertation develops a framework for the visualization of dynamic terrains for use in interactive real-time 3D systems. Terrain visualization techniques may be classified as either static or dynamic. Static terrain solutions simulate rigid surface types exclusively; whereas dynamic solutions can also represent non-rigid surfaces. Systems that employ a static terrain approach lack realism due to their rigid nature. Disregarding the accurate representation of terrain surface interaction is rationalized because of the inherent difficulties associated with providing runtime dynamism. Nonetheless, dynamic terrain systems are a more correct solution because they allow the terrain database to be modified at run-time for the purpose of deforming the surface. Many established techniques in terrain visualization rely on invalid assumptions and weak computational models that hinder the use of dynamic terrain. Moreover, many existing techniques do not exploit the capabilities offered by current computer hardware. In this research, we present a component framework for terrain visualization that is useful in research, entertainment, and simulation systems. In addition, we present a novel method for deforming the terrain that can be used in real-time, interactive systems. The development of a component framework unifies disparate works under a single architecture. The high-level nature of the framework makes it flexible and adaptable for developing a variety of systems, independent of the static or dynamic nature of the solution. Currently, there are only a handful of documented deformation techniques and, in particular, none make explicit use of graphics hardware. The approach developed by this research offloads extra work to the graphics processing unit; in an effort to alleviate the overhead associated with deforming the terrain. Off-road ground vehicle simulation is used as an application domain to demonstrate the practical nature of the framework and the deformation technique. In order to realistically simulate terrain surface interactivity with the vehicle, the solution balances visual fidelity and speed. Accurately depicting terrain surface interactivity in off-road ground vehicle simulations improves visual realism; thereby, increasing the significance and worth of the application. Systems in academia, government, and commercial institutes can make use of the research findings to achieve the real-time display of interactive terrain surfaces

Bridging Private and Shared Interaction Surfaces in Collocated Groupware

Multi-display environments (such as the pairing of a digital tabletop computer with a set of handheld tablet computers) can support collocated interaction in groups by providing individuals with private workspaces that can be used alongside shared interaction surfaces. However, such a configuration necessitates the inclusion of intuitive and seamless interactions to move digital objects between displays. While existing research has suggested numerous methods to bridge devices in this manner, these methods often require highly specialized equipment and are seldom examined using real-world tasks. This thesis investigates the use of two cross-device object transfer methods as adapted for use with commonly-available hardware and applied for use in a realistic task, a familiar tabletop card game. A digital tabletop and tablet implementation of the tabletop card game Dominion is developed to support each of the two cross-device object transfer methods (as well as two different turn-taking methods to support user identification). An observational user study is then performed to examine the effect of the transfer methods on groups’ behaviour, examining player preferences and the strategies which players applied to pursue their varied goals within the game. The study reveals that players’ choices and use of the methods is shaped greatly by the way in which each player personally defines the Dominion task, not simply by the objectives outlined in its rulebook. Design considerations for the design of cross-device object transfer methods and lessons-learned for system and experimental design as applied to the gaming domain are also offered

Playing with Virtual Reality: Early Adopters of Commercial Immersive Technology

This dissertation examines early adopters of mass-marketed Virtual Reality (VR), as well as other immersive technologies, and the playful processes by which they incorporate the devices into their lives within New York City. Starting in 2016, relatively inexpensive head-mounted displays (HMDs) began to be manufactured and distributed by leaders in the game and information technology industries. However, even before these releases, developers and content creators were testing the devices through “development kits.” These de facto early adopters, who are distinctly commercially-oriented, acted as a launching point for the dissertation to scrutinize how, why and in what ways digital technologies spread to the wider public. Taking a multimethod approach that combines semi-structured interviews, two years of participant observation, media discourse analysis and autoethnography, the dissertation details a moment in the diffusion of an innovation and how publicity, social forces and industry influence adoption. This includes studying the media ecosystem which promotes and sustains VR, the role of New York City in framing opportunities and barriers for new users, and a description of meetups as important communities where devotees congregate. With Game Studies as a backdrop for analysis, the dissertation posits that the blurry relationship between labor and play held by most enthusiasts sustains the process of VR adoption. Their “playbor” colors not only the rhetoric and the focus of meetups, but also the activities, designs, and, most importantly, the financial and personal expenditures they put forth. Ultimately, play shapes the system of production by which adopters of commercial VR are introduced to the technology and, eventually, weave it into their lives. Situating play at the center of this system highlights that the assimilation of digital media is in part an embodied and irrational experience. It also suggests new models by which future innovations will spread to the public

Grafting: An Approach to Exploring Crossovers Between Craft and Gaming

This thesis investigates the crossovers between craft practices and the play of video games by utilising innovative design and making approaches. The study challenges assumptions about craft and gaming by exploring their intersections and sheds light on the potential value for contexts beyond individual practices. Through an analysis of skilled amateur craft and gaming, the research explored an emerging field by considering the embodied nature of video gaming and its theoretical relationship with craft. Specifically, this study contributes new knowledge through the development of ‘graft-games’ that reveal potential to improve production efficiency by directly connecting craft and gaming. The study combines theoretical investigation with creative practice, employing a mixed-methods approach that spans the fields of craft and gaming. This study establishes new ways of thinking about embodiment and practice in both fields by drawing upon craft theory and games studies. Indeed, through an analysis of autoethnographic observations of amateur craft and gaming case studies, this study also develops a conceptual model that articulates areas of crossover between them. The conceptual model is evaluated through a progressive series of applications and prototypes. Firstly, the graft-game, Hazuki Knit, is informed through a series of public participatory events. A second prototype graft-game, Pocket Racer, is developed through observations of skilled practices within the Blackburn based garment manufacturer Cookson & Clegg, tested at a festival site through public interaction and deployed as an intervention into a small-scale production process. The evaluation and analysis of graft-game prototypes indicate the value of introducing craft-game hybrids into manufacturing contexts. The study contributes new knowledge through the concept of grafting, positing that creating new or merged goals for users supports the development of individual strategies for improving efficiency and reducing risk. New hybrid forms of knowledge emerge through cross-fertilisation and conjoined experiences between craft and gaming. By utilising creative practice this research contributes to our theoretical understanding of the relationship between craft and games, adding new understanding in the form of ‘graft-games’ and the value these generate