Revit 2019 Octane 4 - Problem and questions

[JM_Koester]

I will post tomorrow how I would assume the converted universal material looks like.

Great work on this - thank you. If you could also post a .RVT which contains those physically based materials attached to the spheres that would help immensely.
Paul

I worry I can't publish that file here, sorry, though the materials setup is really simple as you can see from the screenshots.

During the test I experience the same issues with the smoothed normals as described here viewtopic.php?f=61&t=70522
The problem only affects geometry which is not generate parametrically in Revit e.g. imported meshes.
I rotated the spheres back due to that issue.

Proper converted materials should look like this in Octane.
Not sure what is going on with the backfaces on the leaf material, transparent is a bit strange and forget the last 2 for now

I tried to markup how the conversion should be done.
Green marks converted values, red are fixed values which should be set.

1. Metal
- Hightlight shape "Long Falloff" translates to BSDF model GGX, short stands for Beckmann.
- All (used in this examples) textures need gamma setting of 1 except albedo, though I'm not 100% sure for transmission.
- Proper texture scaling for all textures should be converted.
- Inside Relief Pattern (Bump) settings is a switch for either normal or height map, that needs to be evaluated somehow and converted accordingly.
- Smooth should be default imo

2. Opaque
- this example uses height map in the Relief Pattern (Bump) slot
- Height value could be converted

3. Opaque with Cutout
- this example uses normal map in the Relief Pattern (Bump) slot

Anyone seeing a mistake or has an idea for improvement, please join in.
I hope it helps.

[face_off]

Thanks. I will look into this more in a week or two.

Paul

[JM_Koester]

Thank you Paul, looking forward to it.

I just realised the normal shading errors should have been fixed with version 4.02.1.58 already.
Unfortunately I still have the problem of materials not showing up in that version.
If you can help me troubleshoot that issue as well, I would appreciate it.

Jan

[face_off]

I just realised the normal shading errors should have been fixed with version 4.02.1.58 already.
Unfortunately I still have the problem of materials not showing up in that version.
If you can help me troubleshoot that issue as well, I would appreciate it.

Jan - can you provide more details in this issue please so I can try to reproduce it on my system?

Paul

[JM_Koester]

I just realised the normal shading errors should have been fixed with version 4.02.1.58 already.
Unfortunately I still have the problem of materials not showing up in that version.
If you can help me troubleshoot that issue as well, I would appreciate it.

Jan - can you provide more details in this issue please so I can try to reproduce it on my system?

Paul

There is not much more information I could provide.
I load a scene (new, sample or existing), I can choose a material from the pull down list but the parameter list is completely empty.
Here is a render example of a sample scene.
I worry it is some kind of individual issue, like the one I originally posted, though I don't have a workaround, except downgrading.

[face_off]

I can reproduce this problem, and it definitely looks like an issue with the latest release. I will investigate in more detail and report back here shortly.

Paul

[JM_Koester]

Hello Paul, do you have any updates for us?

[face_off]

Hello Paul, do you have any updates for us?

I posted at fix for the Octane 2018 version of the plugin at viewtopic.php?f=61&t=71092. I will post an Octane 4 version of the plugin which also fixes this issue tomorrow.

Thanks

Paul

[JM_Koester]

Hi Paul,

are you going to publish a demo version of the latest Revit plugin as well?
Any progrss on the PBR material conversion?

Best
Jan

[face_off]

Hi Jan.

The demo version is available at viewtopic.php?f=61&t=71092.

Regarding PBR materials, I have answered this previously (but cannot locate the post). In summary, the Revit PBR material doesn't easily translate to an Octane material. I don't see a reliable method of converting these materials.

Thanks

Paul