RIM SHADER
1. Create surface shader, ramp , sampler info from hyper graph. 2. Adjust the ramp to black and white. 3. connect the shader nodes sampler info to ramp. 4. choose facing ratio and vcoord inside the connection editor. 5. Select the ramp node drag and drop with middle mouse click on the outcolor of surface shader. 6. Adjust the Ramp to get desired Rim.