This is a derivable mesh only!! Another great room for developing with 50+ texture slots to get the most out of your product! All maps run with the numbers on textures, so you may have to turn some texs 90 degrees before application. ALWAYS REMEMBER TO SAVE ALONG YOUR WAY! This new previewer is tempermental! Best to leave what is set as two sided as it is and empty slots as empty for best results. Grab on to this one and go to town, you'll love the floor plan and the easy numbered and colored coded maps. Please leave feedback on your likes or dislikes to help me in further meshes. Please remember to set your product as non-derivable ... Thanx!