Making leaf veins

mark lautenbach

I need to make a leaf texture, hopefully one that can be modified to make multiple leaf types, and am looking for advice or a good reference for how to make the vein structure within a leaf. 
I see a lot of examples of textures and generators, but not good info on how its done.
Anyone have a good example or tutorial on how this is done?
I feel that once I figure this out, it will unlock a lot of other possibilities. 
Thanks

poopipe

There's a nice voronoi node on gumroad somewhere that some of our foliage artists have used to great effect. alternatively you could look at igor elovikov's nodes which shuld allow you to create the same sort of effect

mark lautenbach

I would really like to figure out how to do the veins procedurally. I can do them old school, but Im hoping to make this thing a bit more versatile and learn some new techniques.

poopipe

What you're asking for is the same problem as growing trees or cracks. 
It's possible to do implement in designer but it is a truly obnoxious endeavour. 

fx-maps are the easiest way to handle recursion but you are very limited in terms of blending. 
Pixel processors are basically the opposite