does anyone know if there is a way to ‘paint’ a texture on to another texture? Like putting a texture on another texture without destroying the previous texture.


Maybe you need to investigate the use of the texture channels - you could use multiple uv mapped images/textures and utilize images that include alpha to get combinations of textures. You could also use black and white textures over a colored texture with the mix mode set to ‘multiply’ or ‘darken’ or any other combination.

If I misunderstood, possibly you just mean to you need to resave your image as a different name before painting on it - that is also very doable in the image editor.

See http://wiki.blender.org/index.php/Manual/Map_To#Stencil and http://wiki.blender.org/index.php/Manual/Material_Nodes#Mix_Node .