Re: [PATCH v4 0/4] MR191: tests: Add more interesting HLSL tests for mipmap levels.

[Zebediah Figura (＠zfigura)]

> One way to handle these kinds of things is to add an explicit quantisation step to the shader output. I think we've done that kind of thing before for HLSL shader tests.

I took that approach in v4, at least for SampleBias().