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I'm trying to decimate using sculpting on a parts of the mesh, the model is quite big, about 40 million polys. I'm fairly new to blender and i would like to get some pointers to tutorials or tips on how to keep my textures intact but decimate parts that are of no interest, for example trees and some of the terrain.

I have a textured model from Metashape/RC, and i want to preserve the UV-map. When using the decimate modifier i get a good result without having to unwrap and bake, but if i want to keep the high detail on a single building this doesn't seem like the right approach.

I'm sure someone has a great workflow for this and wouldn't mind sharing it. Coming from Metashape and Reality Capture, blender can be a bit overwhelming so any thoughts would be appreciated :)

Cheers

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In Sculpt mode, you could try to use the Dyntopo > Collapse Edges mode. It will change the minimum geometry size to the threshold chosen in Detail Size. Make sure the brush is at a Strength of 0.

enter image description here

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  • $\begingroup$ I'm gonna try this on some google earth rips right now $\endgroup$
    – James Riley
    Commented Sep 1 at 19:17
  • $\begingroup$ @James Riley there are several ways to simplify a mesh, it really depends on the mesh $\endgroup$
    – moonboots
    Commented Sep 2 at 11:29
  • $\begingroup$ thanks you've always helped me so much in the past. I tried this method on google terrain, and sadly it disrupts the UV map immediately. thanks again $\endgroup$
    – James Riley
    Commented Sep 7 at 2:26
  • $\begingroup$ @James Riley, yes but you could duplicate your object, do it on the copy, then bake the diffuse map from the original? $\endgroup$
    – moonboots
    Commented Sep 7 at 7:01
  • $\begingroup$ I will try that now $\endgroup$
    – James Riley
    Commented Sep 7 at 21:06

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