Aura3D 4.0.7

Superseded. This version is deprecated. Upgrade to Aura3D 4.7.16.

Fixes found by porting eleven Crayon games and by verifying WebXR, WebGPU compute and the batching path on a real browser.

• Fix: batched.mesh / instances.mesh multi-draw was broken on a real WebGL2 context. The draw-data texture was bound as a raw Texture; u_drawId was uploaded with uniform1f; the shader extension name was wrong (GL_ANGLE_multi_draw; WEBGL_multi_draw is now enabled at device creation); and canMultiDraw compared TextureBindings by identity so no scene ever merged. A 92-vehicle frame went from 92 per-vehicle draws to 3 multi-draw calls carrying 552 members.
• Fix: material.custom no longer silently skips a draw when a declared uniform is unused. The GLSL compiler optimises unused uniforms out; they are now flagged optimisable, the draw proceeds, and the material reports CUSTOM_UNIFORM_UNUSED. A genuinely missing required binding still fails with a named error.
• Fix: WebXR runtime (verified against the independent iwer WebXR emulator in remote headless Chromium, not a headset): the local-floor reference space is now requested as a session feature; a failed reference-space request no longer leaks the XR session; per-eye viewports are persistent instead of being reset by beginFrame; zero-width views (mono devices) are skipped instead of failing the session; xr.button({ app }) accepts a plain AuraApp.
• Verified: WebGPU compute (compute.*) runs on a real software-WebGPU device: vector add over 65,536 elements, a shared-memory reduction and 2D/3D dispatches read back exactly. WebGPU canvas presentation works in headed Chromium under Xvfb (add @headed-xvfb to SPECS on the remote runner); headless Chromium + SwiftShader still destroys the device at the first presented frame.
• Codemod: the VRButton, ARButton and WebXRManager rows are now approximate (emulator-verified; real-headset behaviour, frame pacing and the opaque-framebuffer path are untested).
• Tooling and examples (not published packages): a slim remote-runner build context (209 MB instead of 1.9 GB); deterministic capture tooling and ports of eleven Crayon games under examples/*-port/ with replay-verified simulations (see docs/workflows/threejs-parity-gaps.md for per-game scope and gaps).