Strange artifacts in radiosity rendering

[Jason Matthews]

Hey everyone. I am doing a project using viz 2005 radiosity and i am getting some strange artifacts where two objects are joinging. I model in autocad and file link to viz. It is hapening in strange places as well. I am using daylight system and about 30 omni lights (photmetric). Here are some images showing this.

 

Solution quality: 85%

Refinements vary between 10 to 25

Filtering: 3

Mesh varies

 

 

Thanks in advance.

[oluv]

do your walls join seemlessly?

 

have a look at the image, you should avoid connections like the second one, which will produce shadow- as well as light-leaks with a radiosity method.

 

if you render with regather the leaks should be gone though. but rendering takes much longer.

[Woody]

If you're using shadow map shadows, try uping the size from the default 512 to something bigger. Try putting a plane above your internals to help block out light leaks.

 

Hope that helps.

[Jason Matthews]

Thanks guys, I will give it a try.

[Jennifer]

Yes, make sure your model is seamless, very important. You can also try enabling "Regather Indirect Illumination" to clean up artifacts. This can slow things up quite a bit at render time, as VIZ recalulates the indirect light for each pixel. This can help with scenes that are not subdivided to a high degree.