Visual Pinball X Material Debugger
-Open a VPX table – press play.
-Press escape to pause and access menu (see diagram below).
-Select Debugger/intera.Ed to open debugger.
-Select ‘Material’ to open material editor.
Select the material for the object(s) you wish to edit. Provided that the primitive object is rendered ‘dynamic’ as opposed to ‘static’ you can adjust material in real time making fine tuning materials much faster and efficient.
For more information on primitive options see: Primitive wiki page