This applies to ArmA (1), ArmA 2 and ArmA 3 satellite texture / mask generating.
Satellite texture == texture map, satellite mask == attribute map.
When you are trying to save large attributes (satellite mask) or texture (satellite texture, doh) it only allows you to increase and decrease the values by multiply… to counter this, type your own number in the spin-box.
When generating large mask/texture it will take a long time in L3DT, you should test all settings first in the smallest (or smaller) resolution to save time. 20480 resolution texture generation takes hours.
Mosaic can go only as high as 4096 resolution on the initial creation wizard. However after you have generated your attributes and texture maps, when you are about to save mosaics, THEN you can type in 8192 resolution for the spin-box. Very odd it doesn't allow that in the first place but on the actual saving phase it does.
Export satellite mask and texture as BMP image format.