draw mesh as image?

im working on a 2d isometric game and i wondered if there is any way to draw a mesh of a character as an image?
(so that it goes behind other images)

I can already extract sprites from pictures of a mesh but that uses a lot of graphics memory and you cant change the clothing,weapons,hair color without needing 10,000 sprites

I think they did this in the original Sims game

i could use render2texture but how do you convert a texture to a blitz image?