Revit 2019 Octane 4 - Problem and questions Tweet

[face_off]

Did you see this error before or is that my individual issue?

I have not seen this issue previously, so I am completely stumped as to the cause. If you could send me a screen capture movie, I might get a clue as to what is happening. I am sorry for the problems this has caused - it is generally very unusual to hit issues like this.

Paul

[JM_Koester]

Since this is a very unusual and individual issue, I assume it has to do with my setup.
I think we can stop trying to figure this out, I know how to avoid it and found that I can fix it temporarily (until closing and reopening the viewport) by switching the camera to panoramic.
No idea why this is happening, but I can live with that.

Thanks again!

[JM_Koester]

...

3. PBR
I don't have a clue how and which information you can receive from Revits API during the export, but for the most part it might be a pretty straight matching.
I think it is very helpful if maps/values for the basics (albedo, roughness, transmission, normal, bump, displacement, emission, IOR and BSDF model) are transfered.

Opaque material should receive metallic value of 0 and metal 1.
Glazing materials seam to be transparent with a IOR of 1.0 and with fake shadows.
Layered material is not 100% clear to me yet, maybe it doesn't translate well, a metallic "Base Highlights" on top of a diffuse color plus clear coat. "Weight" in that case acts like metallic with it's own roughness value and the diffuse part doesn't have any roughness setting. It's confusing.

I will take a look at this for the next release.

Thanks

Paul

Hi Paul,
can you make an rough estimation about the timing of the next release?
Best regards
Jan

[face_off]

can you make an rough estimation about the timing of the next release?

My estimate is that it will be available in the next 2 weeks.

Paul

[JM_Koester]

can you make an rough estimation about the timing of the next release?

My estimate is that it will be available in the next 2 weeks.

Paul

Awesome!
That is much sooner than I expected.
I decided to stick with Octane, looking forward to it.

[JM_Koester]

Hi Paul!

I tried the add-on version 4.02.1.58 and have an issue that the material node list is completely empty and right-click doesn't open up a context menu.
Materials are all white when rendering, therefore I assume there are no materials assigned.

From reading the change notes, I guess the PBR material conversion didn't make it in yet. Do you still think it will be implemented soon or did you experience any major issues?

Cheers

[face_off]

I tried the add-on version 4.02.1.58 and have an issue that the material node list is completely empty and right-click doesn't open up a context menu.
Materials are all white when rendering, therefore I assume there are no materials assigned.

Hi. It is just o some materials, or all? Is it possible you clicked on the material from a reference scene?

From reading the change notes, I guess the PBR material conversion didn't make it in yet. Do you still think it will be implemented soon or did you experience any major issues?

I had a good look at this, and couldn't see any correlation between the Revit Physical material and the Octane Universal PBR material - they seem like completely different things. So, sorry, I don't think the Revit Physical material can be converted to Octane (unless I was looking at the wrong thing). Perhaps you could post some screenshots of Revit PBR materials and the Universal material it would convert to?

Paul

[JM_Koester]

Hi. It is just o some materials, or all? Is it possible you clicked on the material from a reference scene?

It's the demo version of the plugin btw.
All materials, I tried a sample scene, new scene and my own scenes too.
I can downgrade to the previous version and the materials show up again correctly.

I had a good look at this, and couldn't see any correlation between the Revit Physical material and the Octane Universal PBR material - they seem like completely different things. So, sorry, I don't think the Revit Physical material can be converted to Octane (unless I was looking at the wrong thing). Perhaps you could post some screenshots of Revit PBR materials and the Universal material it would convert to?

Paul

Really? Maybe I'm wrong, but I will dig into it a bit more and post some information with examples and screenshots.
So far my understanding was that they basically split the principled shader into 5 separate shaders, documented here http://help.autodesk.com/view/ARENDERING/ENU/?guid=GUID-C8B55D63-2167-48FE-BBC3-F6C3758EE3EE
In general, even if we cannot have a 100% conversion, it would help a lot to at least convert some information.

[JM_Koester]

I setup a test scene with one example for each new shader, though I think opaque and metal are most important, transparent usually doesn't have a lot of texture information, therefore I start with them.
I added an opaque material with alpha transparency as well.
The material on the text of the balls is all over the place, not sure why, please ignore it.
On a side note, why are the spheres flat shaded? Are custom normals not exported?

Rendered in Revit:

Rendered in Octane:

Material setup in Revit:

Except the transparent material all materials convert to glossy materials with the same settings except diffuse color.

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

[face_off]

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