![]() ![]() When you're happy with the result save the image and open it in Photoshop. Add higher samples value to reduce grain, just keep in mind this increases render time. Keep playing around with the values to get the quality you need. Find the Max Distance value and increase to let say 100. Please note: if your render is black, try to set your exposure control to No Exposure Control in the Rendering > Exposure Control menu. The default values assigned to the material are not optimal for what we want to do. Chose Instance to make sure the material updates when you change the settings (Fig.06).Īnd you will probably see a more or less completely white render. You can now drag and drop the material you just created onto the Material:None button. Open the Render Setup menu (F10), then click the Processing tab, find the Material Override option and click Enable. The shader should look something like this now (Fig.05). Under Basic Shaders click the Surface parameter and select Ambient/Reflective Occlusion in the Material/Map Browser (Fig.04). You should now see the mental ray shader. ![]() Give it a new name, like "AO material" and click the Standard button to select the mental ray shader in the Material/Map Browser (Fig.03). Then open your Material Editor (press M) and select an empty material slot. Earlier versions should work too, but there might be slight differences in interface.įirst you have to make sure you have assigned mental ray in your Render Setup menu (press F10) (Fig.02). Please note that this tutorial uses 3ds Max 2011 and Photoshop CS5. As a separate pass you can adjust and manipulate to your heart's desire without affecting the rest of your render. So if you want to skip all that, you can simply use a material override in your render options to get the job done - it's super fast and gives you the added bonus of having the ambient occlusion in a separate pass. ![]() You could create an ambient occlusion effect by using lights, but it can be slow to render and tricky to get the right look. Ambient occlusion adds great realism to your renders, but can be bit cumbersome to set up in Max, particular if you're using a mix of mental ray shaders and standard shaders.
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