[Gimp-user] 8 and 1 bit images

The mask files needed are exactly what you state - the 'white' area is
'transparent' so when the original image (actually a satellite image
of an area in the world) is 'compiled' together with the mask file the
black area is interpreted as that part of the original image you want
NOT included and the white area allows the corresponding area of the
original image to 'show through'.
I have attached the original satellite image and the 'water mask'. The
black area in the water mask will result in all that part of the
original satellite image being masked OUT and the white area will
allow that part of the original satellite image to show through.
Hope I have explained properly.
Apart from an obvious smaller TIFF file (1 bit) it apparently results
in the compiled image file (a file type BGL which is used with Flight
Simulator) also being smaller.
I guess it's just to make smaller files.
I must get back to the 'scenery forum' and ask some questions.

looking at this

http://www.fsdeveloper.com/forum/threads/bland-mask-water-mask-how-to.18894/ it

"quote" ...is the watermask. This gives water characteristics to any black area.
The mask is an 8-bit tif using only black and white

So that is all you need. A grayscale image. If your image has transparency (an
alpha channel) remove it

Layer -> Transparency -> Remove Alpha Channel

export as as a tif

rich404 (via www.gimpusers.com/forums)

[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]