Here is another sample that I charted and knitted, the section
with the circles combines intarsia with illusion knitting.
This is the view from the top:
This is the view from the side:
I had experimented a lot with these designs in my knitting
program. Unfortunately, my hard drive died at that time and I lost all of the
charts except the ones I had already printed out to knit from. This is definitely
an interesting technique although it takes a while to come up with something
that looks good when knitted.