OTOY Forums

Hello,

Is it possible to use separate maps for environmental lighting. I'm used to using Maxwell where you can have separate maps for illumination, reflection, and background.
The SiBL system also uses separate optimized maps for illumination,reflection and background.
Th problem I am having with Octane that when i use an HDRI, the background is too dark if i set the correct illumination/exposure and if I set the background so it appears correctly, the exposure is blown out.
I shoot my own HDRIs so I am sure what looks correct.
I have tried using an non-HDRI lat-long image for the environment and the background looks fine but it doesn't supply illumination.
Combining the HDRI and non-HDRI would be perfect.

Win 7 64bit | Quadro K4200 | 2X Xeon E5520 | 16GB

Michael Grant

hi,
currently Octane can't handle different HDRIs for splitting of illumination, environment, reflection and refraction.
For octane hdri illumination, the more crucial parameter is the Gamma that should be set around 1 for better results.
A workaround for having a different environment beside the illumination from the same HDRI, is to activate the multy pass; render only the environment with the desired look in a fraction of time; then, disable the multi pass, enable the alpha channel and set the HDRI for illumination only.
At the end, you need to compose the results with an image manipulation program.
ciao beppe

The ability to have a separate background independent of lighting and reflections is quite useful. I use that frequently in iRay.

The addition of reflection to the matte material would also be useful.