reduce polygond on a 3 millions triangle mesh

Support Modeling
1

I have a sculpted model (3 millions triangle). I need to delete the lower multires level. Now I want to make a lowpoly with retopo, but it is very slow. So I need to reduce polys, but Blender freezes with the decimate modifier. I try the edit mode mesh “poly reducer” script, but it fails too.

Any idea?

2

With errors? Or just unresponsive? If it’s just a normal freeze, let it run over night. I think you would probably know (but just in case) the decimate mod makes the topology look terrible But if you will retopo on top of i, that won’t be a problem.

3

ANOTHER way would be to split your model in 2 or 3 parts then apply the decimator and then after you can combine it again

hope it helps

4

Did you try the “Poly Reduce Selection (Unsubsurf)” script, right above that one? This one preserves topology and edge-flow really well (though you have to run it twice for expected results).

You may want to split the model as suggested by RickyBlender … the sheer density of your mesh may cause the scripts to lock/crash Blender, even the one that’s right for the job.

5

wow this is a simple and good idea
with split I no need to decimate
I splitted the model to 10 parts and when I retopo I show only the needed parts

thank you :slight_smile:

6

Meshlab has a really nice decimation plugin that produces some quite clean results…you might want to try that.

A few months back, i did a free video for Eat3d that shows a comparison between Polygon Cruncher and Meshlab’s decimation quality
http://eat3d.com/free_meshlab_polygon_cruncher

I reduced a 500k model to 2k in the video so its a little different to the situation that you are in, but i thought i would post it anyway :stuck_out_tongue: