I'm using 2.52i version because gauges and mirrors needs render target checked and version 2.52j have a small bug related (with render target). I'm trying to set up eight gauges in the cockpit using one Multi/Sub-Object with eight sub-materials. From the begining: - Open the material editor - Set Multi/Sub-Object - Set MORE THAN ONE Sub-Material but make sure to assign a gMat to each one - Set up the textures in your sub-materials - Assign the Multi/Sub-Object to any mesh - Try to do the mesh You will get "Top level material MUST be Multi/Sub" JA ! Gotcha. I've not tested this on version J, but since I'm trying to do gauges, and they all need the render target active, there is no point to upgrade my gMotorMaterial until a new version comes out. Workarounds are welcomed, including travelling to ISI headquarters to finish the export there