Resample question

I have some really good photoreal bgls made with resample from the FSX SDK. This is a very simple process.However.....near or on where one bgl ends and the other starts I have thin black lines......where the corners of the bgl bitmap ends is a large black square which stubbornly refuses to resolve into an image. I have tried all the sliders to no avail. Less importantly, it appears that some of the colors are not produced properly near some edges of the bgl...pink and red spots on a roof, for example. Here's the interesting thing.....If the water effects are turned on, the area where two bgls overlap (over land) develop the rippling waves one sees on water. The overlapping part of the image is also much lighter in color.I did a search on black squares in this forum but didn't see anything else that applied.I'll post some screenshiots tomorrow.