Texture paint paints random parts of model In order to texture my models, I use &quot;Smart UV project&quot; to generate the UVs, using a margin of 0.5 to 1 to prevent bleeding. That doesn't seem to mitigate the issue however. Whenever I paint on one part of the model, occasionally it will paint other parts as well. This picture seems to describe it:

From original link to picture:

Hi all :)
I made this mech - not wanting to spend the next month of Sundays UV mapping it, I did a faces unwrap in UU3D, which takes a couple of seconds. What this does is to lay each face out separately, similar to what Blacksmith does. No use as a template, but great for 3D painting.
Problem is, the paint bleeds through in all sorts of unrelated places - there are close to two hundred separate meshes in there. I realise that the unrelated faces are probably laid out close together in the map, but this paints perfectly in both Blender and Hexagon. I've checked the map and Carrara has not messed up - the faces are not overlapped and do not touch.
I've even tried mapping it with Blender's &quot;Smart unwrap&quot;, which does something similar but with more detail. Again, this paints perfectly in both Blender and Hexagon, but I get the same bleeding with Carrara.
Another thing is that Carrara does not seem to respect shading domains. If I select a shading domain it does restrict painting to that domain, but when I select another next to it and de-select the first, it will paint over the first. Not referring to this model, but others that have been unwrapped conventionally.
Is this just how it is and I must look to another solution, or am I missing something here?
Has there been any improvement in C8.5 (I am using 8.1) ?
Cheers :)
Edit to add : I've taken a look at the 3D paint file and see that the faces it is bleeding to are not laid out close - they are scattered all over the place.

I don't know how to fix this issue, any help is appreciated. Thank you.
If your UV Mapping is alright and this is still happening, make sure that the Occlude brush option is checked/enabled.