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@demofox @BartWronski definitely. But my point is, in gamedev (or generally outside of "research"), many of these things are not because someone wanted to find a theory; they are because someone wanted to save half a millisecond. I'm 99% sure stochastic mip sampling happened in gamedev only because of in a virtual texturing system manually doing full trilinear is very costly. Someone had an idea of random mip choice, and went "hey that does not look too bad!" and so it shipped.