Paint on model with multiple overlapping textures (Daz's Genesis)

[Imago]

Probably someone else alredy asked this but I can't find anything... So, sorry I have to ask again!
I'll try to be the more precise possible:
I found a nice addon for Blender called ZeroBrush made by Blender Sensei. I saw the videos and found it really useful (at least it makes a bit more immediate the painting process), plus Blender seems to be very fast on handling 3D Models.
But I want to use it to paint DAZ's Genesis chars that have a very complex UV mapping set.
They uses several UV maps for a single model: The face has a UV map and a texture, torso has another UV mapping and a separate texture and so on.
All the UV maps are overlapping in the same space. This way it can use more defined textures in smaller areas.
There's a way to paint seamlessy on all those UV maps in Blender?

[Pte Jack]

I don't think they are using multiple UVMaps, I think the object uses multiple materials that are tied to the one UVmap (which is normal.) Problem with the paint engine in blender is that when in edit mode and you look at a material UV in the image editor, the map only shows the mesh of that material (unless you have keep UV Image in Sync with edit mode turned on) and you can pick the texture for that material, however if you go into Paint Mode, all the mesh assigned to that one UVMap gets displayed making it impossible to paint.

One solution is to duplicate the model, then separate the mesh by materials. This will break the model up making the mesh for each material into objects bringing the UV map for that particular material along with it. You can then paint each object for the model and then use the new textures for the materials on your unseparated model.

[Imago]

Thanks for the answer, Jack.
Unfortunately that method will bring to another issue: seams.
If I paint on separate surfaces the stroke will stop on the border of the UV and the near surfaces doesn't get painted. I need to paint them seamlessy on every texture with a single brush stroke.

[Pte Jack]

Yup, and you don't want to join those parts together and try and re-unwrap the model because you'll never get the same UVMap. That problem the only good answer I can give for it is, "Unfortuanately the Steam Sale is over and you missed a good deal on Substance Painter or 3D-Coat."
Painting across materials seamlessly is something that should be done in a paint program like those. Even if the mesh was together and laid out in a single UVMap so all the mesh in on the same material UV, working with separate islands on a map is a pain when your trying keep transitions between the islands seamless.

I think you're wanting to go into Vertex Paint mode and paint directly on the model itself. Again, unfortuanately I can't make any recommendations or even know if that will solve your problem as I have both of those programs and use them to work complex textures.

[Imago]

I see... Well, at least I can said I tried that way!
Thanks for the answers, Jack!
I thought about those two softwares... But 3DCoat gave me a bad impression on mess (I tried it) and Substance Painter is simply too expensive for my pockets!
I would like to use 3DCoat Modding Tool (simplier and more focussed on painting) but it can't be used in any way but painting Rust's in-game rocks!
I got Blacksmith3D but it suddenly became slow, unstable and really annoyng... I hate it doesn't save tool and workspace settings.
Anyway, thanks again Jack!

[Pte Jack]

Time for you to get away from Blender paint tools and painting the UV in the Blender image editor though (if you're not already using Cycles and the node editor). By the sounds of it, vertex painting and cycles nodes will be the norm and using the the old paint tools will fade into non existince when creating complex textures. I'm trying to make the switch now myself.

Thing about SP though, If you buy a license and you let it expire, you can still use the product for personal or commercial (indie license up to 100K annually) after the expiry date (forever!). You just don't get updates or upgrades that happen after the license expires until you either buy a new license or sign up for a subscription. As for 3d-Coat, I hear you, but I bought 3d-Coat back at version 2(?? I think it was). I haven't had to buy a new license yet and my current version is 4.8.10 (I should check for updates on that and see if it has gotten any better).

[seimän]

If your a student and you cant affort substance you can apply for a student version, which you can get for free. You wil get substance painter + designer for free (1 year license). Only downside is that your not allowed to make any profit, but still you can learn it for free which is awesome. I'm in university and I use it myself.

https://www.allegorithmic.com/buy/education

[Imago]

@ Pte Jack
I don't use Blender (my small skull can't contain all those sliders, buttons and values), I just thought it could be helpful for painting my textures, since my old painting software became incredibly slow and unreliable lately (Windows 10 update seems to be the cause)
I'll check what you said about Substance Painter, thanks!

@ Seiman
Sadly I'm a bit too old to be a sudent again!
Plus I need a tool for my job... So the non-commercial stuff is a double "nope"
Thanks for the advice, anyway!