2
$\begingroup$

My attempt to accomplish this was to create 2 separate UV maps that only map the vertices in the region I want to apply the displacement maps to. Then I apply 2 different displacement modifiers and use one UV map for each. This did not work as expected. Here is what I did specifically:

  1. Create a mesh. In my example I am using a simple ring model made by using a smaller oval curve as the bevel object for a larger circle curve. After increasing the Resolution Preview I then convert this object to a mesh.

enter image description here

  1. Delete existing UV map

  2. Select first subset of vertices for one of the displacement map. Generate new UV map with UV > Cylinder Projection. Direction should be align to object and select Scale to Bounds

enter image description here

  1. Select the next subset of vertices. Create a new UV map (Object data properties > UV Maps > Plus button), and then generate the new map with a Cylinder Projection again

enter image description here

  1. Create 2 displacement modifiers with the coordinates set to UV and the 2 different UV maps selected. These are the displacement maps I've used and the resulting mesh

enter image description here

enter image description here

enter image description here

enter image description here

This almost works as I expect. Each displacement map is in the area I want it to be, but the outer surface has both displacement maps applied. I noticed when I created the second map, the original map's vertices seemed to be under the new map. However I am not able to delete these. I am assuming this is the root of the problem, but I don't know how to solve it.

Please let me know if I need to supply additional information

$\endgroup$
1
  • 1
    $\begingroup$ Did you try to additionally use vertex groups for your displace modifiers? Just the ones you need? Should be pretty much the same as you selected for the UV map, maybe that helps $\endgroup$
    – Chris
    Oct 20, 2021 at 13:09

1 Answer 1

2
$\begingroup$

You have already created two vertex groups, OutsideGroup and InsideGroup, and used them for the UV Maps. You only need one more step: Add the appropriate vertex group to the Vertex Group field of the correct displacement modifier.

$\endgroup$
2
  • $\begingroup$ This did work for me. Do you know why it’s necessary? When I create the second UV Map why do the original vertices populate it and how do it get rid of them? $\endgroup$
    – jminardi
    Oct 20, 2021 at 23:58
  • $\begingroup$ No I don't. You'd think the UV Map would be sufficient, but the modifier works on the entire object unless you give it a vertex group. $\endgroup$ Oct 21, 2021 at 1:20

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.