HDRI Image loses 16bit info in surfaces

[batman911]

Hi,

I've used HDRI's for environments but plugging the texture into the texture environment and this works well.

However instead of doing that I'd like to map the image onto a polygon and the place this behind my subject. However I've noticed that the image loses all it's 16bit info. I've tried changing gamma and brightness etc but it looks like 16bit isn't supported in surfaces, whereas it is in the render target, is this correct?

Thanks, Alex

[frankmci]

I'm not a lightwave user, but if I understand what you are trying to do, you can map your HDRI onto an Area Light and use that as your backdrop. Either that or use it as a luma map on a normal polygon. But I think there are some render optimizations in Octane that make actual Octane Light objects more efficient.

[elsksa]

Hello batman911,
Octane currently has this limitation which has been reported already: viewtopic.php?p=380230#p380230

you can map your HDRI onto an Area Light.

I have noticed that the "̶G̶a̶m̶m̶a̶" seems to be set to ~2.2 (sRGB approx.) instead of 1.0 (Linear Transfer Function).

[batman911]

Thankyou both, OK let's hope they do that soon. Frank, I looked at that but it's just not as realistic in glass reflections as a true HDRI, thanks anyway though.