Size?

What determins the "Maximum Texture" that can be used on a specific model when painting?
I.E.....
Carenado...........1024x1024
Flight 1 MD-80....4608x512
I tried to double the size on the Carenado,but the textures wouldnt' load in the sim?
Any ideas on this...
P.S. Better painting resolution at 2048x2048 on the Carenado paint.
Jeff
I.E.....
Carenado...........1024x1024
Flight 1 MD-80....4608x512
I tried to double the size on the Carenado,but the textures wouldnt' load in the sim?
Any ideas on this...
P.S. Better painting resolution at 2048x2048 on the Carenado paint.
Jeff