Masataka Sumi
Software Engineer at 株式会社バーチャルキャスト
Tokyo, Japan
Summary
🤩
Rockstar🎓
Top SchoolMasataka Sumi is a software engineer in Tokyo with 14 years specializing in real-time 3D CG, particularly character-focused workflows for games, VR, and virtual talent. At VirtualCast since 2018 he has driven VR application and format development, including co-designing VRM and VCI file standards and operating real-time mocap at events from live houses to arenas. He combines hands-on Unity/C# and modern C++ development with shader work, Python tooling, and full-stack contributions to prominent open-source projects like UniVRM. His skill set uniquely spans modeling and content tools (Blender, Substance Painter), professional stage video systems (SDI, switchers), and mocap systems (OptiTrack, Xsens), allowing him to bridge pipeline, runtime, and live-production constraints. A Tsukuba-educated engineer, he’s known for practical fixes—such as blendshape and material bug resolutions—and UI improvements that smooth artist and developer workflows.
14 years of coding experience
Master of Engineering - MEng, Computer Science, Master of Engineering - MEng, Computer Science at 筑波大学
Github Skills (6)
gltf10
vms10
unity3d10
3d-graphics9
graphics-programming8
shader8
Programming languages (4)
Github contributions (5)
vrm-c/UniVRM
Feb 2019 - Jan 2023
UniVRM is a gltf-based VRM format implementation for Unity. English is here https://vrm.dev/en/ . 日本語 はこちら https://vrm.dev/
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:1213 reviews, 513 commits, 272 PRs in 3 years 11 months
Contributions summary:Masataka contributed to the VRM model rendering and editing aspects of the project. They were involved in bug fixes to address issues such as blendshape light intensity normalization, inspector bugs, and alpha issues in materials. Their contributions also extended to UI development, including the modification of menu layouts for utility scripts.
gltfunity3d
Santarh/MToon
Jan 2018 - Nov 2022
Toon Shader with Unity Global Illumination
Contributions:20 releases, 3 reviews, 238 commits in 4 years 10 months
shader
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