How to create Ambient Occlusion in Autodesk 3Ds Max

                                Ambient Occlusion use for contact shade which used in compositing for gettingthe depth. Now we will see how to create AO.

After creating the scene, go to in render setup,change the render engine from scanline to mental ray. Now take a material  and apply mentalray map - Ambient/Reflective Occlusion in the diffuse of that material . Then apply on your scene and take the render. Now we got the basic occlusion . Now we can work on the various parameters like max distance and Spread. For the quality enhancement we have to increase the sample value, but remember more sample value means more render time.
                                                       When you turn on the mantal ray the final gather automatically will on,but for Ambient Occlusion its not need . You can turn off the Final Gather.

                  A small tips ,by selecting your AO material and increase the Self illumination value to 100.Now check your render .It will give you the Good result. For further details follow the below video. Hope you all will enjoy.