Lighting Analysis

[JamesTaylor]

Hi all.

 

I'm currently trying to set up radiosity lighting for a project at work. The attached renders show the Illuminace, Luminance and actual render of the scene at present. I was hoping for some feed back and pointers as i seem to have come to a stage were improvements becoming slow.

 

The renders attached have a solution quality of 75% with no refine iterations and the filtering set to 3.

 

One particular problem i'm concerned about is the lack of any shadows even though all lights are set to shadow maps. I've tried changing a few to ray traced but there is no diffence.

 

At present there are 6 photometric point lights with a web distribution and a strength of 4000cd. The position of the lights correspond with the recessed lights in the ceiling.

 

Thanks James.

[Jennifer]

Hi James,

 

Do you have it Re-Using the Direct Illumination, or are you rendering it? (Render Dialog, Advanced Lighting tab, Rendering Parameters roll-down)

 

If you reuse Direct lighting, then you are locked into the mesh for indirect, direct _and_ shadows. A low resolution meshing will not give good results for this feature.

 

Are you subdividing the mesh? If so, what is your meshing size? Lighting information is stored in the vertices, so more vertices gives smoother results. Filtering at 3 is okay if your mesh size is failrly small.

[JamesTaylor]

Hi Jenni.

 

I'm meshing to 200mm and have render direct illumination selected in the rendering parameters.

 

Thanks James

[chunwai]

Wall, Ceiling and the floor, subdividing mesh try to 100mm, and Filtering set 1-2 is ok,too high your image look so uniform, solution quality set to 85%, using Re-Using the Direct Illumination will Causes rendering time very long!!

[kamikaze]

Hello, im having the same problems with radiosity... whats the diff... of render direct ill and reuse direct ill?? and what does the meshing size do?? my work looks no different rendered with or without radiosity

 

Can anyone help??