I have an issue with my polygroups changing.
I create my polygroups at subdiv lvl 5, then step down in subdivs to lvl 1, then when I go back up to lvl 5 again, they’re still there, but they are now lower in resolution, matching what I would see on lvl 1 in shape.
Any ideas why this is occurring ?
Cheers,
Because that’s not going to work. For instance, see what happens to your polypaint when you drop from level 5 to level 1.
yes, but the polypaint doesn’t get destroyed when stepping up the subdivisions again. I mean you can easily polypaint at lvl 5, step down to level 1 for whatever reason, then go back up to 5 and keep painting without losing previously painted information.
Does not seem to work the same with polygroups.
Never tried to do what you say you are doing. Maybe you should be using subtools instead? Some info here which may or not be helpful. http://docs.pixologic.com/reference-guide/preferences/draw/
I have an issue with my polygroups changing.
I create my polygroups at subdiv lvl 5, then step down in subdivs to lvl 1, then when I go back up to lvl 5 again, they’re still there, but they are now lower in resolution, matching what I would see on lvl 1 in shape.
Any ideas why this is occurring ?
You have to create polygroups on the lowest subdivision level.
Imagine subdividing a quad, and giving each of the four resulting faces their own polygroup. If you step down to the first level, you now have a single face occupying four polygroups. That’s basically why problems happen when you start stepping back up and down (its a bit more advanced than that, you’ll run into problems even if you don’t step down a level - saving and reloading the tool for example) . Like others have said, polygroups need to be created at the lowest subdivision level for stability / predictability.
Also note that polypainting colors each vertex. This is why you see the same color on the same vertex in the lowest division as the highest division. Polygroups are using faces while polypaint uses vertices. To see this effect then go to your lowest division level and turn on Polyframe. Now go to your highest division level and paint a vertex red. Now paint outside that vertex in a blue circle without painting any of the lower vertex points. Now go back to your lowest division and check out your color. The red bleeds out from that vertex point and there’s practically no blue color at all (there may be some very slight purplish blue color just barely bleeding on the edge of the red.)
So although it’s called Polypaint it’s not really painting the poly, it’s actually painting the vertices and bleeding the color between vertices. Polygroups are grouping the polygons (faces). Similar name but using different 3d objects.
Ok, thanks for the explanation guys. I just never tried creating them on a higher level before.
I just assumed that it would be able to retain that information when going down in the subdivs even if it wasn’t created on lvl 1.
This would be a handy feature and I would imagine it could work based on the same algorithm that’s used to reconstruct subdivision history.
Cheers.