Did you know the Mercury texture is not existent in SFS 1.4? I mean, the planet file it says: "planetTexture": "Mercury", BUT Stefo Mai Morojna screwed up the files, and as a result, there is not a texture named "Mercury" in the memory of SFS, so that white you see, is not that Mercury is white, is that it simply has no texture.
EDIT: by the way, beautiful landing you have there!