The Dirt and Dust nodes
The Dirt and Dust nodes work with inputs from the Ambient Occlusion, Curvature, Position, World Space Normal, and Mask (optional) nodes.
The Dirt node produces a dirt map effect using all the aforementioned nodes, while the Dust node produces a dust map effect using only Ambient Occlusion, World Space Normal, and Mask (optional).
So, let us apply the Dirt and Dust effects to our project:
Figure 8.46 – The Dirt and Dust nodes
The Ambient Occlusion node that we have is merely an Output node as shown in Figure 8.47:
Figure 8.47 – A single Ambient Occlusion input node
Therefore, we need to add Ambient Occlusion (HBAO) between the Height Blend and Ambient Occlusion inputs, as shown in Figure 8.48.
You can study more about Ambient Occlusion (HBAO) and Ambient Occlusion (HTAO) in the Atomic nodes section.
Figure 8.48 – Adding Ambient Occlusion (HBAO)
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