WebGPU rejects block-compressed textures whose base dimensions aren't
multiples of 4; three's KTX2Loader only warns and transcodes anyway, so a
baked GLB carrying one odd-sized user-item texture (e.g. 299x399) poisoned
every render pass — endless 'Invalid BindGroup … Invalid CommandBuffer'
spam. Route such payloads through a fallback transcode to uncompressed
RGBA32 and repackage the pixels as a plain DataTexture (three's WebGPU
upload path crashes on a CompressedTexture holding rgba8 data).
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
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