HDRI Environment
Posted: Thu Mar 12, 2015 9:38 am
Hi there,
I have to setup an HDRI env within octane and I've got a few problems/ questions on this. First setting up the scene with an HDRI Environment works fine but the scaling of reflections/ objects are much to huge on the objects i have to render. Therefore I created a scaled Environment object with flattened ground and so on. Now I tried to get similar results with Texture/ Blackbody Emission but that doesn't work well.
- can you explain the differences between Texture vs. blackbody emission? Is there any or can I use both? the overall look is pretty similar but currently I'm just doing preview renderings with low sampling an DL.
- the main problem is that I didn't find the right settings to get a good sampling quality with the use of Texture/blackbody emission - as HDRI env. it just takes 50 samples to get a good preview - with emission channel 512 samples are still pretty noisy. The shadows look completely different and so on. When I set the hdri gamma to a value lower than 1 it improves rendering times but the picture looses contrast/ shade.
What I would need ist the behavior of the HDRI-Environment Object (less sampl.rates, shadow behavior) but on a mesh (also tried to move the env. tag to the object - know this wouldn,t work but
... tried all projection modes in hdri env. tag but that's not what i'm looking for, This morning i discovered a knob I didn't know its called imp.samp. in HDRI env.tag when I turn this one off the renderings looks a bit more like the grainy emission rendering.
- what the heck is the HDRI env.tag doing there? I cant' reproduce it with emission ...
- How can I do this? Is there any way to solve this problem?
Thank a lot!!
chris
I have to setup an HDRI env within octane and I've got a few problems/ questions on this. First setting up the scene with an HDRI Environment works fine but the scaling of reflections/ objects are much to huge on the objects i have to render. Therefore I created a scaled Environment object with flattened ground and so on. Now I tried to get similar results with Texture/ Blackbody Emission but that doesn't work well.
- can you explain the differences between Texture vs. blackbody emission? Is there any or can I use both? the overall look is pretty similar but currently I'm just doing preview renderings with low sampling an DL.
- the main problem is that I didn't find the right settings to get a good sampling quality with the use of Texture/blackbody emission - as HDRI env. it just takes 50 samples to get a good preview - with emission channel 512 samples are still pretty noisy. The shadows look completely different and so on. When I set the hdri gamma to a value lower than 1 it improves rendering times but the picture looses contrast/ shade.
What I would need ist the behavior of the HDRI-Environment Object (less sampl.rates, shadow behavior) but on a mesh (also tried to move the env. tag to the object - know this wouldn,t work but
... tried all projection modes in hdri env. tag but that's not what i'm looking for, This morning i discovered a knob I didn't know its called imp.samp. in HDRI env.tag when I turn this one off the renderings looks a bit more like the grainy emission rendering.- what the heck is the HDRI env.tag doing there? I cant' reproduce it with emission ...
- How can I do this? Is there any way to solve this problem?
Thank a lot!!
chris
) - so I see there's no easy way to do this ... use environment and get wrong sized reflections AND/OR do a bunch of renderings to see what's going on there ...