setValueT6 method
Implementation
void setValueT6(RenderingContext gl,Texture? v, [WebGLTextures? textures]) {
  final cache = this.cache;
  final unit = textures!.allocateTextureUnit();
  if (cache[0] != unit) {
    gl.uniform1i(addr, unit);
    cache[0] = unit;
  }
  textures.setTextureCube(v ?? emptyCubeTexture, unit);
}