Hello, I created few 3d models using a 3d scanner. The problem is that mesh is extremely dense. Is there any option to reduce mesh density using blender tools, or the only option is to remesh it manually?
Any, yes, like decimate and remesh modifiers. But you might want to check what meshlab tools can do to reduce geometry.
So far I see the options in Blender are:
a) the Remesh modifier (I’ve seen some tricks in combination with bevel modifier to get a better topology )
b) Decimate modifier ( If you don’t care about a good topology, or don’t need to animate )
c) Manuall retopology. (there are quite some add ons for that like retopoflow, miratools, retopo MT, etc)
Is not good instant meshes for this too?
The remesh modifier is not for reducing mesh density. To maintain original details you may even create more faces that you started off with. It is there to give a uniform mesh structure.
Depending on the type of object you have scanned and the capability of the scanner you may want to use the laplachian smooth modifier to remove surface noise
The decimate modifier has a number of decimation methods