(Boy, that title is a mouthful... also not sure if this is the best forum category for this since it touches on so many subjects, but whatever.) I'm essentially attempting to dynamically capture the sky in a slowly-updating cubemap so that a reflection probe can use it for world reflections. See picture: Why? Because the clouds are rendered as a post process effect using Post Processing Stack v2 and they contribute significantly enough to make a considerable difference in the lighting. Which brings me to the general problem: I can't figure out what steps are necessary in order to ensure camera post effects are applied as expected when rendered to a cubemap instead of a traditional 2D texture. You can see in the screenshot that not all the cubemap faces are correctly using their history buffers in the post effect (the closest one on the left/front is considerably smoother than the top or right faces which are grainy). I expect this is an issue with the post processing effect, however I am new to creating custom Stack v2 effects and the documentation is pretty minimal to say the least (not to mention I don't think rendering to cubemaps is a typical use case). I just don't know what I'm doing wrong. I've been looking around for anything that might point me in the right direction, but after exhausting all the Google searches I can think of and not finding what I need, I've given up and resigned myself to posting here. For reference, the cloud effect I'm using can be found here: https://github.com/GuitarBro/VolumeCloud/tree/StackV2 (which was my attempt at a Stack v2 port of Yangrc's excellent VolumeCloud effect that can be found here: https://github.com/yangrc1234/VolumeCloud). It works great on my main camera, but clearly not on my cubemap camera. As a vague guess, I suspect my issues lie somewhere in VolumeCloudPPS.cs where the different buffers are set up and in CloudShaderPPSv2.shader which manipulates the buffer textures. Unfortunately, my lack of Stack v2 custom effects and the lack of documentation on creating Stack v2 effects (that work with cubemaps) pretty much stops me there. I just don't know what I don't know. Any help would be appreciated.