the attached image does lots of funny things.
mug (which probablly can't handle the image)
displays an image striped in the bottom half.

it's all black with a varying α, but displays all
black in faces with the new draw code, but
blue with the old (drawterm) code.  togif
makes it blue again on plan 9 and under xv.

i haven't yet made much progress with this one.

- erik