Pow(0, 2.2) gives 1 in a hlsl pixel shader?

Looking at the HLSL docs pow(x, y) appears to be implemented directly as exp(y * log(x)) . Since x=0 in your question, again looking at the docs log(x) == -INF . It seems like the value of y shouldn't matter at that point as long as it's positive and greater than zero.

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