Shading with ambient occlusion

[Instructor] Ambient occlusion is a very powerful…and versatile effect that can be used in many circumstances.…It's original purpose to block ambient light…is no longer needed in the wonderful world of…a brute force global illumination renderer…such as Arnold.…But ambient occlusion is great for special effects…based on distance among surfaces.…In this case I'd like to employ it in a shader network…to make the recessed areas of this picture frame…darker and rougher, or less reflective.…

Picking up from the last movie,…I've already got the attribute editor,…the Arnold render view, and the node editor open.…Displaying the shader network for the standard surface…material applied to the picture frame.…It's got a bump map.…For clarity in the demonstration,…let's disable the bump effect.…Select the bump node and in the attribute editor,…set the bump depth to zero.…Also for testing, let's change up the parameters of the…AI standard surface material, select that node,…and in the attributes, set the diffuse weight…to its maximum of one,…