Lazy_VAbout me

Games, graphics, and handhelds.

I build graphics libraries, engines, games, and small tools. Before starting my PhD, I completed an MSc in High-Performance Graphics and Games Engineering at the University of Leeds. My MSc covered modelling and rendering, animation and simulation, geometry processing, high-performance graphics, and scientific computation. I also have professional experience developing game servers in Shanghai. I collect retro handhelds and enjoy bringing games and software to GameShell, Game Boy, PocketCHIP, and Trimui. Away from code, I enjoy singing — OmniLyrics grew out of wanting a lyric tool that worked the way I wanted. Curiosity and the satisfaction of making something keep me coming back.

zzxzzk115@gmail.com GitHub itch.io Bilibili QQ WeChat Blog

Also Kexuan Zhang, PhD researcher & graphics programmer at University of Leeds. Academic page

Current focus

Updated 17 Oct 2026

Working on

OmniLyrics
Refining my cross-platform lyric tool, recently focusing on signed macOS releases, installation, and lyric display.
libvultra
Developing the VRI-based graphics framework on dev-VRI, with the near-term goal of supporting small rendering demos.

Exploring

CUDA & GPU programming
Following CIS5650 independently to understand high-performance GPU programming more deeply. Projects 0 and 1 are complete; Project 2 (stream compaction) is halfway through.
P0 · Getting started P1 · CUDA flocking P2 · Stream compaction

Up next

Advanced real-time rendering studies
Build small rendering demos on libvultra, exploring GPU-driven large-scene rendering and sampling techniques relevant to my research.
Planned work items
- GPU-driven culling & indirect rendering
  Frustum culling, hierarchical Z-buffer (Hi-Z) occlusion culling, stream compaction, and indirect drawing, with visibility and timing comparisons.
- Cluster-based LOD & geometry streaming
  Mesh clustering, hierarchical LOD selection, and on-demand geometry streaming, taking inspiration from Nanite.
- Virtual texturing
  Feedback-driven texture streaming, page tables, and cache management under a fixed memory budget.
- Tiled & clustered shading
  Compare tiled and clustered light assignment in forward and deferred shading, including light-list construction and shading cost.
- Dynamic global illumination
  Explore voxel-based global illumination (VXGI), Dynamic Diffuse Global Illumination (DDGI), and Lumen-inspired surface-cache and radiance-cache experiments.
- ReSTIR DI & GI
  Implement ReSTIR DI for many-light direct illumination using spatiotemporal reservoir resampling, then investigate ReSTIR GI for indirect illumination and VR applications.

Featured Projects

All projects · 28

C++ / Lua

Lazy-100

A Lua fantasy console with code, sprite, map, sound and music editors, built on VRI for desktop and browser play.

Play Breakout Browse cartridges Source

Indie / Steam

Cells of Division

A top-down bullet hell roguelike on Steam — fight alongside clones of your past runs inside the immune system. Free demo out now! Co-founder of High Path Games; programming lead.

Free demo on Steam