Voxel Remesh: Fix poles and preserve volume

This commit fixes most of the issues we currently have in the voxel remesher. Mesh volume is preserved when doing multiple iterations, so the sculpt won't shrink and smooth each time you run the remesher. Mesh topology is much better, fixing most issues related to mask extraction and other topology based operations.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D5863

release/scripts/startup/bl_ui/properties_data_mesh.py

@@ -476,7 +476,9 @@ class DATA_PT_remesh(MeshButtonsPanel, Panel):
         col = layout.column()
         if (mesh.remesh_mode == 'VOXEL'):
             col.prop(mesh, "remesh_voxel_size")
+            col.prop(mesh, "remesh_fix_poles")
             col.prop(mesh, "remesh_smooth_normals")
+            col.prop(mesh, "remesh_preserve_volume")
             col.prop(mesh, "remesh_preserve_paint_mask")
             col.operator("object.voxel_remesh", text="Voxel Remesh")
         else: