Chaos Corona for 3ds Max > [Max] I need help!
Corona correct Gamma settigns
sumeetgupta:
Hi all
I am a vray user and planning to shift to Corona. However whenever i render my scene in Corona, I get very washed out image. Probably due to incorrect gamma settings ?
When i save the image, it looks much better. My Gamma settings -
When i render the scene, i get result like this -
When i save the image to hard disk, it looks like this(which i think is correct result). My final output and render settings-
Any suggestions are welcome. Thanks.
maru:
In Max's preferences set output gamma to 2.2 (set 2.2 everywhere). Don't touch Corona's internal gamma settings. When saving a .jpg check "use system settings", when saving .exr, .hdr or other 32-bit file, check "override gamma" and type 1.0.
Correct me if I'm wrong.
sumeetgupta:
--- Quote from: maru on 2014-06-11, 20:29:13 ---In Max's preferences set output gamma to 2.2 (set 2.2 everywhere). Don't touch Corona's internal gamma settings. When saving a .jpg check "use system settings", when saving .exr, .hdr or other 32-bit file, check "override gamma" and type 1.0.
Correct me if I'm wrong.
--- End quote ---
I did set output gamma to 2.2. I still get very washed out render in Corona VFB. Every time i need to check "override gamma" to 1.0 while saving an image. Desperately need a fix.
Ondra:
this is 3dsmax thing and it was fixed in 2014
Ludvik Koutny:
If you have not touched gamma in corona's render settings, then what you are seeing in VFB is CORRECT, and what you are saving is WRONG!
If you are not saving to EXR files, then in your 3ds Max gamma settings, set output gamma to 2.2. That will ensure JPG, TIF, PNG, BMP and such formats are saved with correct gamma.
The reason your image is washed out is probably due to the fact you use unrealistically bright superwhite materials (above RGB 220).
Corona renders very large ray depth by default, so rays do not get terminated early, and bounce light around a lot. Superbright materials then reflect almost 100% of incoming light and result in lack of contact shadows. Superbright materials also make rendering extremely slow.
What Keymaster said is true, but most probably unrelated to this case, as he did not bother to read your post thoroughly ;)
Also, if you are opening HDRI images, for your environment for example, make sure to manually override input gamma for all HDRI files to 1.0 in open bitmap dialog. Input Gamma set to 2.2 will work correctly only for non-HDR formats, such as JPG, TIF, PNG, BMP etc...
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