I tested and I'm okay with jit.gen + jit.gl.gridshape + jit.gl.multiple
Indeed, it seems very efficient.
I didn't have notice something with multiple.
Here, I'm using a gridshape circle named and "multiplied" by jit.gl.multiple
But the first original instance indeed isn't considered. I guess I could also process its coordinates etc but did I miss something else smarter here ?
I need to keep the whole stuff into my window in 2D now.