Richard,

I encountered this several times before but always forgot to post it.

When you use a THTG with Catalyst e.g. with 2400 x 600 the first Mix (left) starts at X Pixel 0, the second Mix (Center) starts at X Pixel 800, the third one (right) at X Pixel 1600.

What I see now is that I always got in second mix one line of mix one at the left edge, same is on mix 3 from second mix.

So I think that Mix 2 or the option for THTG Ctr needs to start at 801, THTG Right needs to start at 1601 to use the correct cuts of the THTG.

Does this make sense?

Best

Rolf