Getting rough edges in sprites

[FamuFamu]

I've been trying to emulate Pixel Art with my sprites, so I made them small and tried enlarging them with Ren'Py commands, but anytime I try that, Ren'Py smooths the edges of the images (Both, at the edge of the image itself and on the edge between colors). I can see the use of this, but I want to turn this off and make images get rough edges, is there a way to do this?

Thanks in advance.

[Asceai]

im.Scale and im.FactorScale can do this if you set bilinear=False.

[FamuFamu]

Yep, that was it. I was actually going to edit the post to clarify that I was looking for a Nearest Neighbor Interpolation but you already replied.

Thanks, Asceai!