The sketch renderer does have it's limitations and it doesn't render the way the normal rendering engine does. SO......here's a suggestion: Render (using the 'normal' render) an image of your transparencies set to how you like them. Save the image. Create a new scene and import your image as a background. Then sketch render just the background image with no 3D objects. The sketch renderer works well on background pictures. BTW this is a great technique for applying the sketch settings to any picture and can make digital photographs look like paintings.... Krel