XM Magdalena 3D print, GGeorgy (3D)
LC #42 Pipers Alley

View Full Version : Sketch pencil look

10-09-2008, 06:45 PM
Hello. I'm trying to come up with a good way to use the Toon Shader to get a pencil sketched look---with hatching and shading done with thin lines. (see attached image.)

I would appreciate any advice. Clearly I'm planning on jumping in with the toon shader. Just wondering if anyone has any expertise or has done this look before. I've seen a preset in Cinema 4D, but I'll be using XSI.



10-09-2008, 07:21 PM
Could you give us a larger, more detailed picture of what you want- looking at this one it's hard for me to tell exactly the kind of hatching and where it is you want it.

I developed a system in LW that was based on oscillating procedural textures, surfaces and 2D motion blur- it could most likely be transferred to XSI.

A basic how to PDF:

Some exampels:

There are several presets on the web for XSI that might suite your needs as well- you can get fairly far with just using incident nodes and overlapping procedurals though.

10-09-2008, 07:36 PM
Here is another image.



10-09-2008, 08:20 PM
So this is a ring? You could try just using different overlapping textures, and then drive the placement of those (using a camera projection for 2D effect) via a gradient mixer. So darker areas get the denser hatching- lighter areas none or a bit.

I'm trying to re-create the motion blur effect I did in LW in XSI and am having a hard time getting it to behave correctly/in a similar fashion. It's also WAY slower to render...will let you know if I have any luck.


10-09-2008, 08:32 PM
Thanks Gideon. Appreciate it. I'll try your method.

Right now I'm just trying to model the ring! It's REALLY hard to model complex shapes that are symmetrical. This has been a great learning experience so far.

10-09-2008, 09:14 PM
By the way, those examples you sent were excellent.


10-09-2008, 10:29 PM
Another take using camera projected textures at different levels of hatching that are placed by way of and incident controlled node.

For symmetry modeling there are many methods- but I find it easiest often just to work on the model up to a point, then split it down the middle, and run duplicate symmetry on it.



10-10-2008, 11:20 AM
there are some great examples of toon shading on xsibase:





10-10-2008, 04:58 PM
Yeah, unless you want to plunk down the 1k or so for C4D and the Toon system in that package you're going to have to get creative. Maya has a few more options as well, but most will cost you.

The biggest thing is understanding how/why a drawing method looks a certain way, and trying to use those "rules" to help you work out your solution. Many NPR renderings that are supposed to look like drawings don't even get 1/2 there as it seems the person making them has never really observed or drawn in that style themselves.

It's a shame that the XSI 2D motion blur does not seem to take surface deformations into account like LW does, at least for this instance, since with just motion blur alone there are quite a few effects you can achieve for NPR.

Still, with some thought, imagination and a bit of working with the rendertree you should get something that you like!

10-10-2008, 05:03 PM
Thanks guys!


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