I have this geometry and I want to keep only the exterior face. How can I get rid of the geometry that is not seen ? The file is here First image is with face that I want to keep and secon is with geometry that is behind face ...and want to get rid of it. Thanks
There is not simple direct way
the proper way is manually retopology ... like 1D_Inc mastered ... you can help your self with "Retopoflow" addon
quick hack with some distortions can be done with cylinder segment with Subdivision modifiers and Shrinkwrap ...
... than use Decimate modifier or if you create a manifold object from it you can search for "Quadriflow Remesher" operator.
- I haven't try with your model but the best hack (theoreticaly) could be bake Point Position map and use it for Displacement modifier. For more info see this Answer