public void UpdatePropertyBlock()
{
MaterialPropertyBlock propBlock = new MaterialPropertyBlock();
render.GetPropertyBlock(propBlock);
propBlock.SetTexture("_MainTex", maskSprite.texture);
propBlock.SetTexture("_SprTex", springSprite);
propBlock.SetTexture("_SumTex", summerSprite);
propBlock.SetTexture("_AutTex", autumnSprite);
propBlock.SetTexture("_WinTex", winterSprite);
render.SetPropertyBlock(propBlock);
}