How to Create Occlusion Passes in KeyShot

Often times an Occlusion Pass is used to add depth to a rendering during post-processing. KeyShot allows you to do this thanks to the Occlusion material. Recently, we took a look at how occlusion works in KeyShot and how it's used when creating your rendering. If you’re not familiar with the term, we recommend you read about it here.

Here’s a rendering of an engine with no post-processing or editing.


In order to add more depth to this rendering, an Occlusion pass was created in KeyShot. Here’s the Occlusion pass.


The Occlusion pass creates shading based on nearby geometry as seen above. To combine these, both were combined as layers in Photoshop with the Occlusion pass on the top layer the layer Blending Mode set to Multiply. This makes part lines darker and boosts contrast on the more detailed areas. Below is the result.


Making an Occlusion pass in KeyShot is very simple.

Step 1. Create a new scene set
Right-click Scene Sets and select Add Scene Set.

Step 2. Apply Occlusion
Drag the Occlusion material (found in the Miscellaneous material folder) onto the top-level of your model in the Project window Scene Tree.

Step 3. Change Material Type (Optional)
In the Project window Material tab, select Flat from the Material Type dropdown (this material is not affected by environment lighting).

Step 4. Enable Performance Mode
Press Alt + P (or select Lighting, Performance Mode) to enable Performance Mode in KeyShot. This disables Global Illumination and Shadows and speeds up rendering.


KeyShot offers the option to add Scene Sets to the render queue. This is a quick and easy way to render an occlusion pass to accompany a rendering.

To try out KeyShot and experience how easy it is to work with the Occlusion material, download a free trial of KeyShot here.

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