I made some improvements on the blending and the way how shader handles colors which are out of the visible range.

As you can see, the bright orange (~3x higher than the maximum visible brightness) blends over the dark model and creates a weird effect.
This has been fixed due to a new blending mode which also has a nicer color gradient:


After some more tests (and maybe some improvements) I will upload the newer version, I think in a new thread.
For this I will have to make it more user-friendly and I need to add a better explanation of the features and on how to use this stuff.