Help - Baking a diamond Vray mat to texture

[dondesno]

Hello! I am studying 3D and although my goal is to work in the field of architecture, our course also covers 3D for video games. We are working with 3ds Max. We are on a summer vacation (1 week) and the teacher gave each of us a specific challenge to solve. Mine is to create a jewel that can be imported as an asset in a game engine. I can only have one diffuse, normal and specular maps.

 

Over the past 4 days, I've been working hard on it, but now I'm seriously hitting a wall. The material and the rendering of Vray is great, but I am totally unable to do a good baking of the diamond. I know that once in game it will stay as it is (the gem will not react to light), but I would like and need to have something that is as close as possible to the Vray rendering. I bake the complete map of Vray and then try to put the right map in the right slot of the blinn, but the result is horrible. I tried a regular rendering of the texture and even a texture projection. But none gives a good result.

 

The professor said that for every problem he has given us, there is a solution. And yes, we are allowed to ask for help since we are in a learning process.

 

Does anyone know what I'm doing wrong or what technique can be used to achieve this goal? I enclose a photo so that you can see ...

 

Thank you in advance!