Octane for Blender
Posted: Tue Jul 08, 2025 9:09 am
Hi,
It's my second atttempt to use Octane for Blender, as I would like to have the possibility to render Deep data.
Unfortunately the renders, when used in Nuke, are causing a lot of problems.
I've created a very simple renders with 2 objects and a volumetric cloud.
And simply DeepMerging the 2 objects renders seems to be working fine, but when you zoom in, you can see that the "intersection" line is aliased:
Also using DeepMerge set to holdout does exactly nothing. None of the objects gets holdouted.
Then, when I try to additionally DeepMerge the volume render it creates strange artifacts. Some areas get negative values and look like a black hole. And it's worth mentioning that the volume render's alpha channel has values above 1.
To fix this, I had to use the merged objects as a holdout for the volume - for some reason holdouting works for the volume, but not for the solid objects - convert deep to image, and merge it with standard 2D Merge node.
But this also creates artifacts. First of all, parts of the volume which have no contact with the solid objects are modified. Some areas become darked, like clamped, and bright pixels appear on object's edges:
I was able to fix those artifacts by checking the "volumetric holdout" option in DeepMerge holdout operation. But that is completely messing up the alpha channel, and the final merge looks like this:
Those are my Deep settings in Blender:
Additionally all DeepRead nodes are shiwing this message:
Can someone please let me know if I'm doing something wrong with the render settings? Cause at the moment the Octane deep renders are completely unusable.
Thanks,
Lukas
It's my second atttempt to use Octane for Blender, as I would like to have the possibility to render Deep data.
Unfortunately the renders, when used in Nuke, are causing a lot of problems.
I've created a very simple renders with 2 objects and a volumetric cloud.
And simply DeepMerging the 2 objects renders seems to be working fine, but when you zoom in, you can see that the "intersection" line is aliased:
Also using DeepMerge set to holdout does exactly nothing. None of the objects gets holdouted.
Then, when I try to additionally DeepMerge the volume render it creates strange artifacts. Some areas get negative values and look like a black hole. And it's worth mentioning that the volume render's alpha channel has values above 1.
To fix this, I had to use the merged objects as a holdout for the volume - for some reason holdouting works for the volume, but not for the solid objects - convert deep to image, and merge it with standard 2D Merge node.
But this also creates artifacts. First of all, parts of the volume which have no contact with the solid objects are modified. Some areas become darked, like clamped, and bright pixels appear on object's edges:
I was able to fix those artifacts by checking the "volumetric holdout" option in DeepMerge holdout operation. But that is completely messing up the alpha channel, and the final merge looks like this:
Those are my Deep settings in Blender:
Additionally all DeepRead nodes are shiwing this message:
Can someone please let me know if I'm doing something wrong with the render settings? Cause at the moment the Octane deep renders are completely unusable.
Thanks,
Lukas