Problem when texture painting

[MRetro]

I made a mesh and got pretty much everything, but now I wanted to paint it. The problem is that, in order to paint some details, either if I paint them on the mesh directly or I paint them on the image, it wont paint as it should (It's hard to explain).

If I paint it on the mesh, the paint goes weird and I can't do a staright line, for example.

If I paint on the image, its better, but since the mesh it's kinda weird, the space I got to paint doesn't work well and I can't do a whole circle without going somewhere else I don't want to go (and besides that, when I paint in that part of the mesh, the paint will go through, showing it in boths sides of the mesh). Any idea how could I paint those details or if there si a program to do that? (I thought of Photoshop, but the cricle would still be weird to paint and it would be in the other side of the mesh aswell).

This is the front: https://gyazo.com/5b14170adb66bbc76bb29c0c8a0ca0ff
And this is the back (that gets auto painted): https://gyazo.com/d1e76dd3d2f1444d759ef489ec8c7285
That is the space I have to paint it: https://gyazo.com/123d0b70c122a3b3406d8ff86674a21d

[Mr Chappy]

If the third image is your UV layout then it looks a mess, this is probably the cause of all your problems.
If it is then it has overlaps, this means that multiple faces of your mesh will share the same texture space, which would cause the painting on the back when you paint on the front.

How have you unwrapped this and did you mark seams?
Would be good to see some pics of your mesh in Edit mode so we can see what you have done.

[MRetro]

Originally posted by Mr Chappy:

If the third image is your UV layout then it looks a mess, this is probably the cause of all your problems.
If it is then it has overlaps, this means that multiple faces of your mesh will share the same texture space, which would cause the painting on the back when you paint on the front.

How have you unwrapped this and did you mark seams?
Would be good to see some pics of your mesh in Edit mode so we can see what you have done.

Yeah that's the UV layout. I didn't mark seams, all I did was select the part of the mesh, press U and "Unwrap", because it's a complicated mesh. And I'm afraid I can't post any pics of it because I want it to be a secret :/ sorry.

[still__alive]

Originally posted by MRetro:

Originally posted by Mr Chappy:

If the third image is your UV layout then it looks a mess, this is probably the cause of all your problems.
If it is then it has overlaps, this means that multiple faces of your mesh will share the same texture space, which would cause the painting on the back when you paint on the front.

How have you unwrapped this and did you mark seams?
Would be good to see some pics of your mesh in Edit mode so we can see what you have done.

Yeah that's the UV layout. I didn't mark seams, all I did was select the part of the mesh, press U and "Unwrap", because it's a complicated mesh. And I'm afraid I can't post any pics of it because I want it to be a secret :/ sorry.

Without more pics its kind of hard to guess what is going on there. I'd have to assume that it is a uv issue, based on the images you've posted already.

When you have a complicated mesh, I would wager that unwrapping it without marking seams is probably almost never going to give you a good unwrap. I just tested the auto unwrap on the starter cube and it doesn't give you a good unwrap on that. It depends on the model's topology of course, but probably the more complicated it gets the more you need to start marking seams and taking control of how it unwraps.

[MRetro]

Originally posted by still__alive:

Originally posted by MRetro:

Yeah that's the UV layout. I didn't mark seams, all I did was select the part of the mesh, press U and "Unwrap", because it's a complicated mesh. And I'm afraid I can't post any pics of it because I want it to be a secret :/ sorry.

Without more pics its kind of hard to guess what is going on there. I'd have to assume that it is a uv issue, based on the images you've posted already.

When you have a complicated mesh, I would wager that unwrapping it without marking seams is probably almost never going to give you a good unwrap. I just tested the auto unwrap on the starter cube and it doesn't give you a good unwrap on that. It depends on the model's topology of course, but probably the more complicated it gets the more you need to start marking seams and taking control of how it unwraps.

I'll try to mark some seams in the complicated part and unwrap it then. Any tips on how to mark seams in an empty semi-sphere?

[Mr Chappy]

Originally posted by MRetro:

I'll try to mark some seams in the complicated part and unwrap it then. Any tips on how to mark seams in an empty semi-sphere?

You can't just mark seams on part of the object, you need to mark seams in all the areas of the mesh that need them for this method to work properly.

The best quick fix is to use the Smart UV Project option when unwrapping instead, it's messy but you should not get any overlaps this way. Make sure the whole of your mesh is selected when using this unwrap method!

[MRetro]

Originally posted by Mr Chappy:

Originally posted by MRetro:

I'll try to mark some seams in the complicated part and unwrap it then. Any tips on how to mark seams in an empty semi-sphere?

You can't just mark seams on part of the object, you need to mark seams in all the areas of the mesh that need them for this method to work properly.

The best quick fix is to use the Smart UV Project option when unwrapping instead, it's messy but you should not get any overlaps this way. Make sure the whole of your mesh is selected when using this unwrap method!

I'm only missing the textures from the difficult part (I've got a few .vtf and .vtm files), so if I separate the complicated part by pressing P and then use the Smart UV Project, would it work? Just saying because I wouldn't like to mess with the other textures that I already have done.

[MRetro]

Okay I did what I wrote in the last message and worked just fine!! Now I'm struggling to paint an oval, but every time I select the curve stroke it won't paint. Do you guys know hoy to draw curves? Btw, I'm also interestedt in some mirror effect respect some axis when painting aswell, but I don't know if there is such a tool.

[seimän]

Originally posted by MRetro:

Okay I did what I wrote in the last message and worked just fine!! Now I'm struggling to paint an oval, but every time I select the curve stroke it won't paint. Do you guys know hoy to draw curves? Btw, I'm also interestedt in some mirror effect respect some axis when painting aswell, but I don't know if there is such a tool.

In order to paint with the curve stroke, create a new curve.. after that draw your curve by holding down the CTRL key. When your done just click on "draw curve".
To draw symmetrical just open the symmetry tab and enable x,y or z.

[MRetro]

Originally posted by seiman:

Originally posted by MRetro:

Okay I did what I wrote in the last message and worked just fine!! Now I'm struggling to paint an oval, but every time I select the curve stroke it won't paint. Do you guys know hoy to draw curves? Btw, I'm also interestedt in some mirror effect respect some axis when painting aswell, but I don't know if there is such a tool.

In order to paint with the curve stroke, create a new curve.. after that draw your curve by holding down the CTRL key. When your done just click on "draw curve".
To draw symmetrical just open the symmetry tab and enable x,y or z.

Thanks!