This is a legacy documentation space! Please refer to V-Ray Next for SketchUp for most up-to-date information.


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The Two Sided material is a utility material provided with the V-Ray renderer. The material allows seeing the light on the backside of the objects. Use this material to simulate thin translucent surfaces like paper, cloth curtains, tree leaves, etc.





Two Sided Parameters




Front Material – Sets the material to be used for front faces as defined by the object normals.

Back Material – Sets the material to be used for back side faces as defined by the object normals.

Translucency – Determines which side (front or back) relative to the camera is more visible in the rendering process. By default this color is black (0.0), which means that only the front side will be visible. When set closer to white (1.0), more of the Back material will be seen. When set closer to black (0.0), more of the Front material will be seen.

Multiply By Front Diffuse – When enabled, the Translucency is multiplied by the Front material.


Material Options



Can be Overridden – When enabled, the material will be overridden when Override Color is enabled in the Global Switches.

Force Single Sided – When enabled, the sub-materials will render as one-sided materials. Disabling is not recommended.


  • This material will give best results when assigned to single-sided (non-shelled) objects like planes, extruded splines, etc. Otherwise it can lead to extremely long render times.