Quote - > Quote - As an example of something you may not be aware of, consider the following x = AGC(Blend(a, b, f)) or

x = Blend(AGC(a), AGC(b), f)

...

If x is the luminance of the object, then the first equation would be identical to render GC since my poser objects tend to look washed out each time I turn on render GC.

In which specific circumstances will the first and second equations yield the same result?

The second is render GC.

The specific circumstances when they would do the same are when f, the mask or blending value, is strictly black or white, i.e. 0 or 1. Under these conditions, the Blend is actually just a pass through of one the two inputs.

They differ when the blend is a non-zero weighted sum of the two inputs. That is the heart of the rendering equation - summing values from multiple light sources - summing values from specular and diffuse - and this is why linear rendering matters. The linear some is wrong when using gamma corrected values.

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