GC is only one little checkbox in your render settings.

But?

When you click that ckechbox, you have to dig in the advanced material room and remove all the faking that was done in the older shader setups.

When you do NOT dig into the advanced materail room, and when you do NOT remove all the old style faking, then you are in render trouble land.

When you use IDL + GC and you add all the old style faking to it, then you get grayed out and washed out renders.

You have to clean out all the faking nodes to render correctly with IDL + GC.

Most end users are terrified of the material room to remove the old style faking and leave it all "as is".

Then put the blaim on IDL and GC.

Or they just continue to render with GC left OFF.

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