Community
Arnold for Cinema 4D Forum
Rendering with Arnold in CINEMA 4D using the C4DtoA plug-in.
cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Volume Mesh Image Based Displacement - C4DtoA

5 REPLIES 5
Reply
Message 1 of 6
fite.a
966 Views, 5 Replies

Volume Mesh Image Based Displacement - C4DtoA

I am currently experimenting with the Volume Mesh rendering for a project and have run into an issue when I try to use an image based texture for displacement. In fact, I can't get anything image based to affect the volume. When using Arnold's built in Noise shader it works just fine and as expected. I just can't figure out why I am seeing no effect when feeding in image based textures.

Does anyone have simple example or node tree that can successfully show image based displacement of a Volume Mesh?

Labels (3)
5 REPLIES 5
Message 2 of 6
peter.horvath6V6K3
in reply to: fite.a

Image based displacement of a Volume Mesh is not supported. You would need voxel based UVs which are not available in a mesh. Using a VDB which contains a UV field should work.

The noise shader works because it operates in object space.

Message 3 of 6
fite.a
in reply to: fite.a

Thanks Peter for the explanation.

I guess I was just thrown off by the documentation

https://support.solidangle.com/display/A5AFMUG/Polymesh+to+Volume

156-head-mesh-volume.jpg

There is an example where a file texture is projected onto the volume mesh. It mentions that it used a camera projection to accomplish it. So I am not exactly sure what kind of texture file it is referring to or how the camera projection enabled the volume texturing. The details are very vague.

Also, do you know what is being referenced in this example of images where is says file texture?

https://support.solidangle.com/display/A5AFCUG/Mesh+Volume

155-volume-mesh-examples.png

Finally, do you know if there are any plans to support image based displacement with a Volume mesh? It just seems like that would be a very powerful feature.

Message 4 of 6
peter.horvath6V6K3
in reply to: fite.a

Right, camera_projection works because it eliminates the need of the UV field:

153-camera-projection.png

> Separately, do you know if there are any plans to support image based displacement with a Volume mesh? It just seems like that would be a very powerful feature.

I don't think it will be supported in the near future.

Message 5 of 6
lee_griggs
in reply to: fite.a

Those are Maya examples. A simple scene for C4DtoA can be downloaded here and here.

Lee Griggs
Arnold rendering specialist
AUTODESK
Message 6 of 6
faura.space
in reply to: lee_griggs

Any chance for the same approach in C4D? Or it works only in Maya cuz it has a 3d texture feature?

Can't find what you're looking for? Ask the community or share your knowledge.

Post to forums  

Autodesk Design & Make Report