Lower your Rendering time by 10

[Renderman]

I found out that if you run a radiosity solution and then change one of your materials properties a tiny amount, you gain a tenfold speed in rendering without any noticeable difference in quality. Has anyone else come accross this? I was rendering an animation during the Holidays and after 4 days when I came back the thing wasn't done! @#$@@@! It was only a test and I needed to tweak one thing slightly. When I rendered it again whithout running the solution again, the animation took 14 hours and I can't tell the difference. Same thing with higher res rendering: it took ten times less. Can anyone else experiment with this and report please. What do you think is behind it.

Cheers and I hope this helps if you are in need of time. Who isn't!

Juan

[abicalho]

Can you give me more information in a step by step format with detailed info on your scene?

 

This is sorta what I am looking for:

 

- Number of lights and types

- Rendering mode

- If Regather, what settings

- Shadow generator type and settings in case you're using Render Direct or Regather and the lights are not set to store direct illumination

- Raytracing Globals Settings

 

Then, to the point of your message:

 

- What material property was changed

- What material type/maps it is

 

There are an infinite number of variables in a rendering (they're finite, but they're combination leads to a very very very large number). Knowing a bit more about your scene helps a lot understand what's going on.

 

Thanks,

 

Alexander | discreet Quality Engineer

[nisus]

Hi,

 

If you were using a harsh global meshing and didn't change anything toyour meshes, viz would not have to recalculate it again... but going from over 96hours to less than 14 sounds a bit to weird... Anyway, give us more info about your scene and used refinening methods

 

rgds

 

nisus

[Renderman]

Hi guys-

 

Here are two images of my settings. The setting I changed was the output that is encircled in red. I changed it from .72 to .70. I have also experimented with changing the rgb output of a map with the same results.

 

http://www.cgarchitect.com/forum/filepush.asp?file=Settings_1.jpg

 

http://www.cgarchitect.com/forum/filepush.asp?file=Settings_2.jpg

 

This last image I have posted before on my posting about map saturation.

 

http://www.cgarchitect.com/forum/filepush.asp?file=LSB_West_1.jpg

Did anyone experiment with this?

Any comment would be appreciated as well.

 

Thanks,

Juan