I have this “Value” in my Glass BSDF node > Color > HSV. I hover over it and press “I” to insert keyframe but nothing happens.
If I hover over “Roughness” and press “I” then it seems to do some kind of keyframe action, but no visible keyframe appears in my timeline or dope sheet.
How do I a) animate the volor value, and b) get roughness keyframe to appear in the timeline?
You need to create the keyframe with the cursor over the color preview even if you only want to change de Value (HSV).
Make sure the shader is selected to display keyframes, or disable the Only Show Selected option:
Going off Picto’s comment, you should be able to adjust material keyframes in the graph editor as well, changing the value by adjusting red, green, and blue values.
If you hit “i” on the color and/or roughness fields (or right-click and “insert keyframe”), then make sure the specific node is selected. Then go to the timeline or graph editor.
If you need “value” specifically, you could add RGB and Hue/Sat/Value nodes, make the RGB node value 1.000 and then keyframe the Hue/Sat/Value node’s value to your liking: