Laying a texture, such as track ballast, the texture takes the form of a rectangle parallel to the wire-frame. This is ok if the track is parallel to the wire-frame. But if it is at an angle you get some amount of a zig-zag pattern in the ballast. That very much out of character to reality. I have tried CTRL, SHIFT and ALT but there is no-way I have found to make laying ballast follow the track.???