Been making a few tiles now!
Reason why it uses bmp is because P3D SDK´s resample cant handle jpeg´s sadly!
One thing I cant get to work is seasons - guess it depends on the source? Summer, fall, spring and winter images needs to be available right?
One other issue Im trying to sort is how to mask out default airport areas etc since the alignment between default airports and the ortho scenery rarely match up so u get dual rw´s, taxiways etc. Ideas?