Newbie question about mirrored UVs

Spoon

Hi,

Very newbish, but cant seem to figure it out. With my mirrored Uvs I can paint on one side, and it mirrors perfectly on the other side, which is great. However, I can't paint on the second side, the paint will just disappear. That is fine as well, but right now it is the object's right side that is paintable, and the left side that is "copying". How can I flip that, so the objects left side is the paintable one? My last object was that way, and I like it, but can't seem to spot a difference between the two UV-wise.

Thanks

slipsius

Well, this should be in the technical talk section, first off.

But what do you mean by paint on one side and it mirrors, but if you paint on the other side it disappears? How did you mirror the UVs exactly? Are you talking about stacking them so they are on top of each other?

Did you mirror the wrong side by mistake?

Saman

Some programs such as deep paint 3d can't handle overlaying UV's that well, when you paint on the "wrong" side in projection view it projects it in a weird way. I just switched to 3d coat which lets you paint directly on the mesh surface without the use of any projection painting techniques. So what program are you using to paint? We need more info if we're gonna be able to help you.

Spoon

My apologies, if anyone can move the thread, I would appreciate it.

Thanks for your response. Yeah, they are stacked. Basically I had half the object, duplicated, scaled in -1 in X, and merged it with the original. Is this the wrong approach?

The thing that only one side is paintable might be something that is related to Mari, then?

EDIT: Hi Saman, thanks for the reply. If that is true, then I guess it's a Mari issue. I don't know much about overlapping UV's, since I normally have only used Mari to texture assets for film with unique UVs. One side being unpaintable is fine, I just want it to be the other side than what it is atm

Justin Meisse

Have you checked to make sure your normals arent't flipped due to the negative scale? Most 3D paint programs wont paint on backfaces.

Spoon

@Justin, yeah, I have. Disabled both double sided and oposite in Maya, so they are clean. Well, I guess I will just paint that one side then, isnt so bad once I got started
Thanks for your tips!

throttlekitty

Have you moved the mirrored shells out of 0-1? If so, painting is probably being ignored.

Sukotto

Scaling in -1 always seems to cause problems even if it appears that your normals are fine. Which is why I never do it.

Use mirror geometry instead and that should fix the problem