Actually the Mental Ray rendering looks a little worse because of the jagged edges. At this stage the Mental Ray rendering will look almost exactly like the rendering with the Scanline renderer. Change the Production renderer from Default Scanline renderer to mental ray renderer.Expand Assign Renderer group on Common tab.Open rendering settings ( Rendering > Render.). 3ds Max Materials in mental ray Renderings For the most part, the mental ray renderer treats 3ds Maxmaps and materials the same way the default scanline renderer does.We have created an FAQ to help explain this change. This change does not affect existing licenses of Mental Ray Standalone, which remain valid. As of April 1, 2017, Autodesk is ending the sale of Mental Ray Standalone to new customers.

Let's change the renderer from Scanline Renderer to Mental Ray renderer: Mental Ray Standalone is no longer available for purchase. If you would like to create a 3D diamond model I suggest the following: use Google to find diamond blueprints and model a diamond using poly modeling techniques.

Change the size of the Plane object when necessary. Create a camera and make sure that you don't see the edges of the Plane object in the view. Change the color of the Plane object to white. Just create two Hedra objects and place them on a Plane object to create something similar to my scene. I use my diamond models but you could just use the Hedra primitive ( Create > Extended Primitives > Hedra) to create some jewels in seconds. Picture 3.This is how diamond models look like when rendered with the default settings of the Scanline Renderer.

Mental ray 3ds max