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Is it possible to project a cavity map from a high res to a low res model?

ZBrush Usage Questions
#1

Is it possible to project a cavity map from a high res to a low res model?

This is my workflow:

  1. setup a white 2048x2048 texture in my texture slot
  2. select hi-res model in lowest subdiv
  3. enter zmapper and capture the mesh
  4. select lo-res model
  5. enter zmapper and enter the following settings:
    cavity blur: 10%, cavity intensity 50% and cavity coverage 90%
  6. hit Create cavity map and end up with a white map :frowning:

Am I doing anything wrong?
Thank you in advance for your time.

Patrick

#2

Try starting with one of the preset configs.

#3

what do you mean?

#4

What I would do is not use ZMapper’s projection. Instead, use ZMapper to create a cavity map. Then go to the highest level and convert the cavity map to polypaint.

Now append your second mesh as a SubTool. Divide it to have as many polygons as the source model. Turn off Zadd and turn on Rgb. Then use Tool>SubTool>Project All to copy the polypaint from the source model.

All that’s left now is to convert that polypaint back to a texture. You’ll now have a cavity map on your new model using the details from the source.

Another way to do it is to not use ZMapper on the source model. In that case, append the new one to the original, divide and use Project All – but leave Zadd turned on. This will copy the sculpt to the new model. You can then clean the projection up if necessary using ZBrush’s sculpting tools (including the ZProject brush). Now use ZMapper on this new model to create your cavity map.

#5

Thanks!