Blitz3d in a Window - Jittery?

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I'm 99% sure the mouse lag issue is not a prirotiy thing.

I think it's the way the messagepump in Blitz is coded.

Rendering/flipping takes precedence over getting all messages from Windows.
Blitz does not empty the message queue, even though it can't keep up reading messages because it's too buzy rendering.

IMO Blitz should throw away messages when it can't keep up.