@rspierenburg said:
Notice how all your walls are Purple? This typically means that the reverse face is showing. Rendering software generally doesn't do well with the back of faces. Set your face style to monochrome and reverse all faces that are purple so that only white faces are shown to the camera, then apply your materials to that face only.
Rob
Hey Rob, apparently the problem is solved with the wall part but not the floor. No matter what face i flip, the render would still go to that sky looking scene. need help asap