"So yeah. The blur kernel can be “spread” to skip some pixels, effectively resulting in a larger blur radius for the same sample count Yes, it’s not correct blur. But that’s okay, we’re not building nuclear reactors that depend on SSAO blur being accurate. If you are, SSAO is probably a wrong approach anyway, I’ve heard it’s not that useful for nuclear stuff. I’m not sure how this blur should be called. Strided blur? Interleaved blur? Interlaced blur? Or maybe everyone is doing that already and it has a well established name? Let me know." - Cem Uzunlar from Bookmarklet