This page renders a fixed test scene directly through librw's GL3/WebGL2 backend (rendertest/main.cpp) -- no GTA III assets, no re3 game engine involved. It clears the screen, draws a solid triangle, a textured checkerboard quad, and a depth-tested pair of overlapping quads, then reads the rendered pixels back and reports PASS/FAIL for each. See docs/WEBGL_COMPATIBILITY.md.