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Palamides
07-09-2005, 04:16 AM
Hey

I am looking for a new render technique or method to render simple 3D objects (no big scenes) so i can show them off for criticism. I currently use the Global Illumination technique (http://www.newtek.com/products/lightwave/tutorials/rendering/globalillumination_skydome/images/troops.jpg) but was wondering if there was any method that would make un-textured models look nice. Any tutorial links or plug ins would be greatly appreciated. Thanks

tischbein3
07-09-2005, 11:39 AM
two things I would recomend you to take a look at:

1. using a ambient occlusion surface shader:

http://www.informatik.hu-berlin.de/~goetsch/AmbOcc/

2. using a shadow mapped spotlight rig:
http://67.15.36.49/team/Tutorials/lighting_rig/lighting_01.asp

hope this will help.

toby
07-09-2005, 03:52 PM
That GI that you linked to (troops) was done in 'the' way to get good looking models, although it could have been set up a little better, what did you want to improve? Have you seen something better that you'd like to be able to do?

One new technique that I've seen lately is to add a black wireframe on organic models, looks nice

SplineGod
07-09-2005, 04:43 PM
You can get a decent look with little to no texturing and a couple of area lights.

http://www.3dtrainingonline.com/personal/evil_tommy.jpg

Palamides
07-09-2005, 05:40 PM
thanks for the input, i saw some tuts on vertex baking, looks pretty sweet

thanks for those links tishcbein, im definately gonna try those, kinda looks like the brazil plug in for 3d max
@splinegod:ive tried area lights, i just want something that can illuminate everything and show off the little details without having to color it. that render looks good though

@toby:what do you mean by a black wireframe around the model, got any pics by any chance?

toby
07-09-2005, 06:52 PM
This is Parm's avatar, you may have seen it on the forums here -

toby
07-09-2005, 06:58 PM
The troops image really suffers from that sharp horizon and the depth of field applied to it, you can see how much more clear and comfortable Parm's image is.

SplineGod
07-09-2005, 08:37 PM
thanks for the input, i saw some tuts on vertex baking, looks pretty sweet
@splinegod:ive tried area lights, i just want something that can illuminate everything and show off the little details without having to color it. that render looks good though


The problem with just using global illumination is you lose control. The idea behind lighting is the same idea behind modeling or texturing...control.
Lighting is something you use to set a mood, sculpt a shape and so on. Its hard to do by simply throwing GI on. I find that GI works best if you use them in conjunction with a more traditional approach. If you want to show off details then place and adjust the lights to show them off in just the way you want. GI tends to soften shadows which tends to soften details as well. I would also look at using spot lights with shadow maps. :)

Palamides
07-10-2005, 08:42 AM
i havent learned how to use shadow maps, I am not very good at rendering thats why I tend to try to use simple stuff. (btw that troop pic is from the lightwave site)


that render with the black wireframe looks sweet, how'd he do that, 2 models (one solid other wireframe)?

toby
07-10-2005, 02:20 PM
He used the Edges tab under obect properties, but to get the actual subpatch edges you have to change the surface of every other subpatch and use only the 'Surface borders' edge render.

parm
07-10-2005, 04:06 PM
Yes.

It's a bit of a pain though, Because every polygon is given a different surface. With a lot of polys it really slows things down. On the Windows platform there is a good plugin that manages to assign only a few surfaces for all the polygons. It's called: asPolygonColoring available on Flay:

http://www.flay.com/getentry.cfm

A Mac version is apparently forthcoming, (waiting patiently).

The lighting is really simple; Window>Backdrop Options> Add Environment> Textured Environment.

Create a gradient white at the top black at the bottom input parameter pitch.

In this scene I'm using backdrop radiosity, 40% ambient intensity,( I know, I don't care). and one area light just to make the shadows a little stronger.

This set up, obviously tweak to suit, looks good even without the wireframe. I think they call it a clay render, and is certainly recommended to show off your modeling skills.

And Toby, thanks for using my cat as an example, very flattered.

Parm

Palamides
07-14-2005, 04:16 AM
that sounds pretty complicated for a quick render, but definately looks amazing. Im gonna try that plugin you posted

Ive been using the ambient occlusion shader though because it creates a fast and nice render of the model.