Viewing Problem

So it is 100% necessary that the player moves through a completely sky-textured room in my map I'm making. My problem arises that I can see into my previously created rooms. I've tried everything to prevent this, most currently being making every texture but the interior textures in my other rooms the null texture. Please help me make it so nothing but sky can be seen when the player passes through the completely sky-textured room! :confused:

try decreasing max viewable distance and moving the skytextured room as far away from the other sections as possible. also try just repositioning some of the rooms or switching them with each other.. sometimes it helps