WEBGL_compressed_texture_pvrtc WebGL extensionThe WEBGL_compressed_texture_pvrtc extension for WebGL 1.0 and 2.0 contexts adds PVRTC compressed texture formats to compressedTexImage2D() and compressedTexSubImage2D().webgl-extensionsWebGL extensionslimitedhttps://registry.khronos.org/webgl/extensions/WEBGL_compressed_texture_pvrtc/https://developer.mozilla.org/docs/Web/API/WEBGL_compressed_texture_pvrtcapi.WEBGL_compressed_texture_pvrtchttps://nowyoucanuse.com/features--webgl-compressed-texture-pvrtc.html