Is there upper limit to vertices in texture paint? I'm trying to paint a terrain in Blender. It has a lot of vertices (132 000) and when I'm getting to that step nothing happens. I decreased the number of vertices in the terrain and then everything works fine. So is there a upper limit? And if so what is the limit?

The steps I took in Blender


Selected the object in edit mode.
Unwrap.
UV/image editor.
Saved the image.
3D view.
Texture paint mode.
Add paint slot (normal).


The version I'm using is Blender 2.74
I Found the problem for anyone that get stuck on the same thing.

Here
http://blenderartists.org/forum/showthread.php?281181-Blender-Unwraping-Problem

When i did the unwrap i got a small warning in the upper bar that said. object has negative scale... 

in object mode use Ctrl+A / scale