I see there are various ways to use one image as a mask for another.

But I'd like to construct a mask of a rectangular shape with an arbitrary position and size within the pix. I suppose I could handle arbitrary position by loading an image file with the rectangle, and [pix_roll]-ing it (twice, once for each dimension), but that wouldn't help with size.

It seems like there should be some pix object to fill a pix region with a color or pattern. But, I can't find it.

Thanks,
hjh

Ahh... as often happens: Post the question, and then find the object.

[pix_rectangle] will at least handle rectangular shapes (enough for what I want to play with now).

hjh