greyscale vertext attribute and load cage

[jwfvr]

hi - seems like the greyscale vertex attribute node does not work if "load cage" is enabled - I am trying to make a material using vertex displacement with weight map but its a no go - is there a way to make this work?

[funk]

That's right it doesn't work. I don't know the technical reasons, but "load cage" strips weight/color vertex maps.

I know that vertex map normals can still work, so it may be possible to fix this for other vertex map data. Paul would need to look into it.

[face_off]

Hi - can you send me a simple scene showing what you are trying to do please?

Thanks

Paul

[jwfvr]

here is a stripped down version - basically I have a gravel texture, and I am trying to add variation by changing the scale based on a weightmap - this scene is only using a base image but in my full scene I have the usual textures including displacement- hence the need to use load cage.

[face_off]

Thanks. A quick question - could you set the Subd Level of the plane to 0 and UNTICK Load Cage?

Paul

[funk]

Paul, if you don't enable load cage, then try to use vertex displacement with any subdivision level above 0 (on the displacement node), you will get splits between polygons.

jwfr, I just thought about another issue, even if this was fixed. Octane can't use vertex attributes in displacement (it's a limitation).
You could use them to create your diffuse texture, but it ignores vertex attribute nodes when connected to displacement.

[jwfvr]

ok got it - yes it works if I use a diffuse texture so I think that's the way to go. thank you!