OK, I'm running imported images through some filters to a billboard
and I'm not following how to use filters that have "infinite
dimensions" such as the triangle tile. Its text says to crop it to
render... so I placed a Crop filter after the tile filter, still no
rendering...turns out even the Crop filter apparently has infinite
dimensions and needs to be cropped to render....huh? Go slow,
now....;-)
The only case where Crop can produce an infinite image is if the
cropping width and height are null.
