void UpdateCanvasShaderChannels()
{
Canvas canvas = dropdown.GetComponentInChildren <Canvas>();
if (canvas == null)
{
return;
}
canvas.additionalShaderChannels |= AdditionalCanvasShaderChannels.TexCoord1;
canvas.additionalShaderChannels |= AdditionalCanvasShaderChannels.TexCoord2;
canvas.additionalShaderChannels |= AdditionalCanvasShaderChannels.TexCoord3;
}