GMP 4.2.4

Tried it, the lib_gmp_p4 variant is still slower than my 4.1.2 static p4 version, e.g. 50 secs instead of 42 secs. Core 2 support won't load, it's 64-bit only. Gladman offered some suggestions but not much real help. Probably the best solution is a 64-bit version.

deep zoom 2^316 movie

It's finally done after 500 hours of elapsed time (times an average of 15 to 20 computers, mostly dual core, for something like 15,000 hours of CPU time). It diverges from the metafis YouTube movie around frame 8497. Why? Maybe his coordinates were slightly rounded? A reliable deep zoom calibration image would be handy right about now. 11/26 OK his coordinates were slightly off, definitely. Only frames 8000-end need to be rerendered though,

source dependencies

gmp: folder at same level as project folder, containing lib and h
DX81: include and lib folders must be added to Visual Studio
htmlhelp: include and lib folders must be added to Visual Studio

clipboard crash

new
zoom
cut 1st item
paste twice (appending)
zoom again
select all but latest snap
delete
undo all and app crashes