Cov replied:

> I won't take the label of expert. But I hope I can help.
> 
> You are possibly the victim of the _transparent parameter. Is that _Blend?
> 
> There is a comet blur effect that can occur when using Copybits or
> CopyDeepMask and the _Blend parameter,  where you don't erase the earlier
> sprite, and draw over it. It fades sequentially, depending on how you
> handle that. Gives the comet effect though. Just change the parameter to
> _srcCopy.

The _transparent param is needed to allow the background image to be seen
through the bouncing circle.


> There is also the problem when using say a very white sprite on a black
> background, the phosphor fade of your monitor as the pixels are lit. They
> take small time to go "black" again.
> 
My monitor is LCD.


> All I can think, if this is ever a problem, is to change the color of your
> sprite, or background, or reduce the speed of the animation.

I'll experiment with this.


Thanks for the reply Robert.

Cheers
Bernie

P.S. The source code is 156K (stuffed) if anyone wants to help me out!