ok....i give up...i cant set up the radiosity like i want it to.

[salf]

Ok, i give up...ive been trying to recreate an image like the one posted in here: http://www.cgarchitect.com/ubb/ultimatebb.php?ubb=get_topic;f=6;t=000120

 

but i cant do it.

 

First i checked the "radiosity override" tutorial from the Autodesk site http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=2254282&linkID=982674 and all i can get is a white image...i cant see anything, just white (this is because the "no exposure control" set up that the tutorials says i have to select) when i select any other option but "no exposure control" i can atleast see the room with all the ceiling lights, but i see the room in some yellow-red color.

 

Im gonna try to post an image of what im getting.

 

 

[ November 16, 2003, 08:40 AM: Message edited by: salf ]

[William Alexander]

salf,

 

The red hues in the room are either coming from the color-temperature of the lights, or the materials in the room. Specifically the flooring. The color cast has the same qualities as the flooring material. If the radiosity override was applied and the color bleed scale set to like .25 or less, it's probably the light color.

 

In the viz help file, search for "Radiosity Workflows". I have found these help topics very valuable and refer back to them frequently.

 

The Ted Boardman articles in the monthly columns of the CGarchitect home page can be very helpful also.

 

rgrds

wda

[abicalho]

There are several things wrong in your scene, and that's why it's not working correctly.

 

First of all, you should not use Omni lights. You need Photometrics with Radiosity. Second, you need real units, meaning you need your room to be modeled with real units, and you need to tell VIZ that.

 

Last, you need to start playing with Radiosity, with your materials, etc.

 

So, start small and go up. Add a Photometric Light, figure out how to setup scale, dimensions, then add radiosity.

 

Hope this helps,

 

Alexander

[Fran]

I looked at the tutorial you reference, and I can't see how a radiosity solution could render properly without exposure control - with logarithmic being the recommended type. I tried a simple scene with Fulton's instructions and it did not work for me either. When using self-illuminated materials with radiosity, you can increase the contrast in exposure control to enhance the effect.

 

The key points to remember:

- use the Radiosity Override material she recommends with a very big Luminance Scale

- set Ambient and Diffuse colors of your base material to absolute white

- enable Self-illumination for your base material and set it to absolute white

- run the radiosity solution

- adjust brightness and contrast in exposure control (logarithmic recommended)