So I have an image of a map which I would like to use to paint vertex groups (for terrain feature particle systems) on certain areas of an object (a sphere).
I have mapped the map onto the sphere. But even if I am in material or textured view, when I go into weight paint mode the object turns blue so I can not see the map so I don't know where to paint.
My next idea was to have a second, slightly larger sphere (in the exact same place) with a semi-transparent material of the map on it such that I could see the map on the large sphere and the weights underneath on the sphere I am weight-paining. But it seems that material view does not show cycles transparent shaders. so the transparency on the large sphere shows up as opaque white and I can not see the weights on the sphere underneath that I am painting.
So is there a way to do this? Either by showing textures/materials in weight painting mode, or by showing the transparency of the material on the large sphere? Or some other way I haven't thought of yet to use an image as a reference to weight-paint on an object?