SHADOW_TYPE NONE 0 SIMPLE 1 RENDER_TO_TEXTURE 2 RENDER_TO_TEXTURE_DYNAMIC 3 RENDER_TO_DEPTH_TEXTURE 4 SHADOW_TYPE: NONE(0) SIMPLE(1) RENDER_TO_TEXTURE(2) RENDER_TO_TEXTURE_DYNAMIC(3) RENDER_TO_DEPTH_TEXTURE(4)