The string colors are random and just to help you track through the spaghetti.

It's what they are plugged into that I'm talking about.

But I'm guessing you know nothing about the material room and how to work the nodes at all.

Funny thing is I'm so far removed from understanding what a beginner deals with, I can't even think of a good initial tutorial to point you to.

You need to reveal the parameters of the nodes, and click on a color chip that is connected to that color ramp, and choose black.

Your nodes are all "collapsed" - they just show their title bars, like little windows. On the right of each node are two buttons - one toggles parameter display, the other toggles preview display.

You need to uncollapse the ones that should be modified. You also need to move them apart so you can see what goes where. That is just dragging them by their titles.

But I fear this whole thing is too advanced for you to undertake as your first activity in the material room.

Does anybody else have suggestions for beginner guide to the material room?

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)