I'm hoping to use the (fairly) recently added stencil buffers as a way of creating a quick mask for post effects. This could be done with multiple rendertextures and then blit with a full screen shader, but I'm wondering what the absolute most efficient approach, and figure stencils might be the right avenue? The image illustrates the desired effect, with a basic blur on the result for sake of the example. Any advice? The closest thing I've come across is: http://qiankanglai.me/misc/2015/03/07/unity-posteffect-stencil/ but the full source is not included, and I'm lost on a few of the concepts. Thanks!