I've never heard that term before, I'm assuming a knurl is a knot ? At any rate, love your flame ! It's intricate & soft & the gradient is subtle. Perfect for this image ! Well done Larry !
Wow ... this is really different. It does look like large knot's you would see in a tree. The colors work perfectly for this flame & I like the soft touch. As always your lighting is spot on. Excellent work Larry.