I have modelled the following head in Blender 2.90.1:
The only modifier on this model is the edge split modifier (30° and Sharp Edges) When i apply the modifier, the edges get disconnected which is subotimal for the rigging process:
If i discard the modifier, the mesh looses quality:
I tried to mark all disconnected edges with sharp edges and merge them by distance, which didn't improve the problem. Does anyone know a good fix to use the edge split mod without loosing the quality and without disconnecting the edges? Would be great, because I used this mod on almost 70% of the whole character. Changing them all by hand would be terrible.