Default Scanline Renderer for VIZ4

[Athena]

I have just started using VIZ4 and after going through tutorials/forums for the program I feel the images I get are still very flat. I am using photometric lights and a daylighting system. I am happy with what I see on my monitor after I run the radiosity, but when I run a raytrace it doesn't look anything like what whas on my sceen. Someone suggested it may be the my rendering engine?? Currently I am using the default scanline renderer that came with the program. Could this be part of the problem???

[Victor Erthal]

Welcome to the forum! Well, if you intent to use radiosity, the default scanline render is the logical choise, since there's no reason to use a plugin like final render, brazil or vray. The viz radiosity uses (imho) the same engine as lightscape, in a very simplified way. So, if you want to improve you image quality, you shoud think about migrating to lightscape.

But maybe you are not using the settings properly. Can you post an image so that we can all see what exaclty the problem is?

[]

P.S.: Are you using "regathering"?

[Athena]

Hi Victor,

 

Thank you for getting back to me. I have attached the image. I have photometric lights and a daylighing system in this model. I ran the radiosity to 90% and have the filter set to 3, the meshing to 6'-0" and did not use re-gathering. I am looking for depth and more detail in the materials. Do you know why there is such a difference between what I see after I run the radiosity and when I run a ray-trace.

 

Thanks for your help!

 

http://www.cgarchitect.com/forum/filepush.asp?file=view1-05_1.jpg

[Victor Erthal]

See, i am not a viz specialist but i think you could use more exposure control, the image lacks of contrast, the oustide seems like a cloudy day, and the inside is too grey. Maybe you could get the detph effect you want by adding some furniture and interior lighting. And the regather wold play an important role in adding realism to the scene. One thing thas usualy works is avoiding complanar faces and overlapping geometry. The white floor in your image, for example. Exacly where the wall meets the floor, you shoud have edges, so that the geometry doesnt run under it. The radiosity (and most engines) makes the light "leak" trough the wall.

But remember... Im not a specialist. The other guys in the forum could have more precise information.

[William Alexander]

Athena,

 

Try setting the mesh to 1' or less. The 6' mesh size is 75 percent of the wall hieght. It's not giving the level of detial in the radiosity I think you would like.

 

Sometimes regathering helps too. Try increasing the contrast in the environment settings.

 

Good Luck!

 

WDA

[Fernando Lino]

Josephine, I agree with the previous posting, 6' is too much, maybe 1' or even 6" will be OK.

 

[ November 15, 2003, 08:01 AM: Message edited by: Fernando Lino ]