threewright-debug

Diagnose and fix three.js pages that are black, blank, broken, slow, flickering or wrong-looking, with text evidence first: tw check (console errors, failed requests, renderer and scene numbers, pixel coverage and brightness, fix hints), tw scene, tw glb, tw lint, and one small screenshot only when the question is visual. Use whenever the user says their three.js or WebGL or WebGPU page shows a black or white screen, nothing appears, the model is missing, tiny or huge, colours look washed out or too dark, it lags or leaks memory, shadows or textures are wrong, it works locally but not deployed, or they paste a three.js error or warning; also 'refresh threewright-debug'. Building new features stays with threewright and its siblings.