Sanjoy,

There's some kind of an upper limit to the size of texture you can use.This problem has been reported before (see this thread). The solution is to make your texture smaller.

A remark about texture size: If you make a render of 4000x3000 pixels and there's a picture on the wall (see the two pictures in your last post) then the size of the pictures on the wall is maybe 800x600 pixels. Why would you apply a texture of 2400x1800 pixels (or something similar) only to have it reduced in the final result to 800x600? It takes up a lot of processor time to calculate every pixel, but none of it shows as a better quality in the final result.

Hans