Yeah, those fry would just look like vieja with a muddier black belt on their body than a pure maculicauda. And a Texas/Trimac probably wouldn't bee too much of a stunner either. You'd probably get a bunch of pearlless fish with the Texas' grey body color and the trimac's body shape. If it's anything like crossing my old Texas and BP, the pearl gene isn't very strong, so many fry don't have much pearling. Also, what's your plan for all these fry? People typically don't have an easy time getting rid of large batches of low grade fry. What do you do with 400+ unremarkable fish?