How can i create a PIXELIZE effect?

[K-OZ]

i am trying to create a "pixelize" effect - should look like oldskool low-res gfx with square pixels.
my idea was this:
- [RenderToImage] with a low resolution
- [SetTexture] on a flat surface
- use in scene

but [RenderToImage] always applies a filtering. in this case it is not the blocky look that i need.
e.g. resolution is set to 26x26px here:

any idea how to avoid the filtering?
or what would you do to "pixelize"?

[gaspode]

Try to use the Operator "Mosaic" under image > effects

[K-OZ]

and it does the trick - thanks gaspode!

[pirx]