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Here's a simple fade in/fade out routine for images. It goes by instantly so you can't see it, unless you insert a 'WAIT' command in there.

The problem for me is the slowest the wait command will go 'WAIT 1' (I've tried WAIT .01 seems to make no difference' is too slow, the fade in/out is not fast enough.

How can I precisely time the fade ins/out, so that it's against a clock and the same on different speed machines (barring a really low caliber video card or some such other problem)?

I've been experimenting with if/then statements and timer() based increments but no luck so far as it seems to slow things down too much. But I might not have just got the right combination of commands.

LOAD IMAGE ONE$,1,1
LOAD IMAGE TWO$,2,1

SPRITE 1,10,10,1
SPRITE 2,10,10,2

FOR X=1 to 255
set sprite alpha 1,255-x
set sprite alpha 2,X
next x

there is no point in fading an image out faster than the monitor can refresh the image, check your settings and for a guess your monitor refreshes 70 or 100 times a second, so if you want the fade to last one second and the refresh is 100 times a second at the monitor then you need to turn on manual syncing and reduce the total fade value by 100th, so if as in your example you fade the image from 1 to 255, then fade by 2.5 per frame and then sync (take two extra frames over to get the remaning 5), if you want to go faster then fade by more per step, you can`t fade any smoother than that since the screen only refreshes 100 times a second, so if you faded (for example) by 300 steps in a second then you would only ever see the 100 frames the monitor actualy drew, the other 200 frames are just a waste of cpu/gpu power since they will never get drawn, hope that explains things ok.

Mentor.

Ah yes. That's helpful. I see what you mean. Thanks.

I wish I didn't have to use the SYNC command, I'd prefer to be able to set a time variable and use some variation on WAIT, but it looks like the way to go.