PhotoScenery same as ORBX?

I am creating scenery Skavsta ESKN for P3D v3/v4 and I want to create photoscenery which the same as ORBX textures. I used to see how someone made such colors photo scenery to be identical to the ORBX. Anyone know how to do this? I have another question. How best to make seasonal textures for photo scenery? Thanks for help
Regards, Kuba