Quick question: When poly painting, is it possible to mirror the paint on the x axis, so that I can paint the model symmetrically?
Basically, you can polypaint symmetrically like usual by pressing ‘x’ (which toggles x symmetry) as you would when sculpting. As long as you turn off Zadd/Zsub, you should be OK.
If you mean ‘projection’ polypainting, where you use a background image to paint your model, then I suggest you mirror the source image first before projecting it onto your model.
If you want to copy your polypainting from one half of your model to the other then that is much harder. Not impossible but harder especially if the geometry is not symmetrical.
Hope that helps.
Revanto 