-da is probably data texture and would most likely be controlling bloom, gloss, specularity, and lightmap. But I don't know if it is set up differently for a planet than it is for a ship.

If it's the same as a ship, the channels iirc are;

Red - Specularity

Green - lightmap

Blue - Gloss

Alpha - Bloom

/e

I think I got the colors mixed up.

/e2

Checked my texture, pretty sure those colors above are correct - for ships at least.

Ahhh Ok so maybe thats why my planet looks to bright i just copied the Lightside Texture for the -da texture hmmm well i will figure that out. One more thing what is specular? I used to know but i sorta forgot