SG Arena 3 and Legacy world when I spawn in them come up in black outlines, no colors no light except the sky, and I'm not sure why. I can see other players, but only in black sillouettes, no colors at all. I am using version 1.7.2 with the compatible Forge and Shaders mod, I am using a 256x Texture pack as well. http://i.imgur.com/AgLfZ3c.png Image of what Legacy looks like when I load into it.
Hm. First, I would say, try Minecraft 1.7.9 clean, no mods, and see what happens. If you still have issue, can you check to see if java is updated? Graphics drivers? This is a long shot, but turn off your texture pack (set it back to default), and go into your graphics settings, and turn mipmap levels off. Let us know what happens.
I turned off my texture and the Mipmaps, but that changed nothing. However I did load up 1.7.9(left my texture on) and the maps show up properly. So its probably Shaders or Forge that is breaking it.
Yes, I stated that only two maps were doing this to me, if it was a client-side setting it would affect all the maps... yes? Anyway, loading up with a clean unmodded 1.7.9 jar seems to have solved the issue, and I am still using the selfsame texture that I had on 1.7.2 and Forge/Shaders. I'll just have to go without Shaders for now, as I don't feel like reinstalling it.
Are you using any other mods that are forcing you to stay in 1.7.2? I currently use SEUS shaders which doesn't require Forge on 1.7.5. Maybe try with just installing the shader pack for 1.7.5 with the resource pack you're using and see if it fixes your problem. I would also do as OnScene has suggested and check your graphics drivers. Unrelated to minecraft, but I had a similar issue with Watch_Dogs where there were random black textures and all I did was update my drivers and everything was fixed. Good luck