Understood but how do you do it Photoshop or another third party editor?
What is the rgb value of wntt0001? From Waffle's post he seems to indicate that you would paint in Photoshop (or a third party editor) these water textures in gndtype.bmp instead of in waterd.bmp. Would seem to be sort of confusing to be using the same value to say set the beach (170,170,170) and then have another strip out in the water use the same rgb value.