Retopo via Decimation

[rosikowski]

If I have a model of 118 millions in voxels, haw I can go lower than 99.9% (118k) with retopo via decimation (since some time I cannot go lower than 99.9%) even if I manually type in lets say 60k polygons under the percentages) do I need to reduce it manually in voxels?

[AbnRanger]

1 hour ago, rosikowski said:

If I have a model of 118 millions in voxels, haw I can go lower than 99.9% (118k) with retopo via decimation (since some time I cannot go lower than 99.9%) even if I manually type in lets say 60k polygons under the percentages) do I need to reduce it manually in voxels?

I don't think the decimation routine was ever designed to go beyond 99.9 (100)%. However, what you could do is simply decimate it a second time, to get it even lower, if you need.

[rosikowski]

cool, but how ? when I decimate it again in the sculpt room, then the decimation amount I type in is added to previously decimated mesh, 
and I have another question, so I decimated this guy :


I noticed in Unreal Engine that the "TopPart_TheGun" looks terrible, so I want to try to add polygons there, can I do it without the need of baking entire mesh again ? 
can I keep previously created 8k texture ? while adding mesh density in that specific part only ? 


EDIT: 
ok I need to seriously start learning retopo room if I want to do my sketch renders and some simple animations in UE xD previous sketch render I had, the orange part looked good, but the top metal part looked like shit xD I`ve added mesh density to entire model, top part is looking better but the orange part looks worse than it was xDD,
(You guys alredy tought me why - its too dense for the smooth surface with normal map) so I need to figure out a way to do one polygroup lower, and another more dense, how can I do that with only one texture file?)

EDIT 2: ok I`ve figured it out, I know how to decimate it one by one, xD lol it was super easy, so one question remains, how to decimate even lower inside retopo room?
 

Edited August 28, 2023 by rosikowski