Rat fur isn't that hard. It's really one node. I have three math nodes here but they're not doing math. I'm just using them to be able to type numbers to adjust luminance, instead of dealing with fine adjustments in the color picker, which is difficult.

Note - this isn't a rat. It's just a ball, stretched a bit.

When trying to design a shader, don't waste time rendering a figure. Use a low-poly stand-in like this. It saves a lot of time.

Rendered in P8 with one infinite light + IDL, ball, ground, and backdrop. About 5 minutes. Raytraced shadows were used on the inifnite.

Note: This is not a shader on the ball - it is on the hair on the ball. I used the hair 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)