Wow! That certainly would be an excellent technique to illustrate medical books about circulatory/lymph, etc. system. Did yo use specular lighting filter? Or all hand drawn? Is the file huge?

Hi. Sorry for the delay. I can't seem to get this forum set up to send me emails when I have replies. I've never had this problem before.

Anyway, I don't know how big svg files usually get, but yeah it seems pretty big compared to my other stuff. It's 300kb, where as most of my other drawings(which are mostly small stuff and logos though) are under 10kb. And it slows my computer to a crawl if I'm zoomed in on this at all on the svg. It's fine of course once I convert it to a raster image.

I just made some paths with a smoothed pencil with a triangle in shape, at first just making something tree-like(I really didn't know what I was going for, was just experiementing and learning), then I took the tree-ish thing, duplicated, flipped it in various ways, resized it, and placed them around symmetrically, added the red and blue to certain parts, and then tried out different filters til I got this effect and loved it. Then I added in the frame which is just 4 or 5 rectangles with gradients and I think a bevel on one or two. I didn't actually remember which filter it even was but after messing around with the XML file itself, it looks like it's the fat oil filter that I used.