Non-Destructive Mirror of a Multires Modifier Sculpt I am in the process of modeling a simple couch. I am sculpting in fabric details using the multi-resolution modifier and various cloth brushes. I'm running into a problem after modeling the first armrest. All I want to do is duplicate it and then mirror it along the X so I don't have to start from scratch.
See this image:


So I duplicate A, position it where I want, and then mirror it by setting X to -1.000. Everything looks peachy so-far. See this image:


If I try to sculpt at this stage, I get a warning that my scale is non-uniform. Sculpting is a big buggy if I ignore the warning. So I need to apply the scale somehow without losing the data from the multiresolution modifier. Unfortunately if I apply the scale, I lose a lot of the sculpting detail. See this image:


So my question is, how can I mirror the first armrest and still retain the multires modifier data? Is this not possible due to the nature of how the modifier works? Is there another (better) way to do this?
Thanks much.
Use Animation Nodes add-on, it is open-source and totally free. I'd suggest a setup like this:

The node tree duplicates A then modify its scale (new y = y*(-1)). In your case, you may want to do it with x instead. I tried to sculpt A.  After I mouse-released the sculpt brush, B would be updated too. In this approach, I can't sculpt the new object (so-called B) directly.


This issue as well as a few similar ones will be solved by Everything Nodes project for vanilla Blender but the implementation is not done yet and there is still a long way to go.

Here are some of Chris-P's Animation Nodes Youtube tutorials. I have no affiliation with the author. However, the first few episodes of the series were very useful to me as beginner. Feel free to comment about better tutorial please.