Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: marobaro on 2021-06-04, 14:44:06

Title: CoronaTonemapControl map not working with Kim-Amlan LUT
Post by: marobaro on 2021-06-04, 14:44:06

Does anybody have a workaround to CoronaTonemapControl map not working with Kim-Amlan LUT ?

setup is: bitmap>camera map per pixel>corona tonemap control>corona shadow catcher mlt

all works as expected until Kim_Amlan LUT is used. then it falls apart.
Is there a list of LUTs that CoronaTonemapControl works with? and which it doesn't?

Many thanks
marek

Title: Re: CoronaTonemapControl map not working with Kim-Amlan LUT
Post by: maru on 2021-06-04, 15:21:13

Hi, we can never guarantee that the negating of the LUT effect will be possible. This is because negating a LUT is not as simple as "reverting" some values, which is the case of some other operators like exposure.
This is a limitation we may never be able to overcome, and it is even stated in the TonemapControl node UI (see screenshot).

Could you explain what exactly you are doing? What kind of workflow are you applying that you need to enable a LUT in the VFB and remove the same LUT via the TonemapControl node?
Maybe we could help with some workaround.