Thanks, Mark. You've been a tremendous help. I figured I was missing something simple. I'll pay more attention to the shader hierarchy now. The hierarchy is easier to see if you collapse the layers with the little black triangles. As you point out in your second note, there are several ways to achieve results, bu they also conflict. After I adjusted the cylinder hierarchy per your note I still couldn't get the shader to appear on the top face. Then I noticed I'd selected a shader in domains list on the right. When I deleted that the main shader took control. I'm getting more comfortable with this. Thanks again.

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