If I'm not mistaken Visage uses it's own jpeg decode algorhytms, and not the datatype system.

If my calculations are correct: it occupies 85 Mb in ham8 - impossible that you can display it on a stock 1200 with 2 Mb chip ram with datatypes. Or with 8 Mb gfx ram.

In 24 bit it occupies 257 Mb. That simply won't fit. See the problem?

The picture is BIG. Maybe some custom picture viewer can show it to you.