Filling and painting tiles

Evening all. This is a bit of an odd one but I think you're the guys who'll know what to do. I've got some tiles in my bathroom with an embossed sort of thing in the middle. Since it's only a few tiles around the room and I can't afford to replace them I was going to paint over the embossed bit for the time being but that looks odd because of the embossing underneath. Could I use filler to smooth the bumpsand paint over it? What sort of filler would be best? Thanks