IBL (Image-Based Lighting) for exteriors?

[stanslavov]

hi all
what do yuo think about this method for exteriors??? one or two lights !!!

10x in advance

[ingo]

one doem light and a raelly good HDRI on itplus a vray cam. I personally LOVE it.

[^Lele^]

Ditto.
The vray dome light IS IBL.
Importance sampling, and the ability to calculate it through IRMap should give you plenty freedom and speed.

Lele

[visumporec]

Dome light is one of the best thing in vray... combined with Hdri = Fantastic!

[^Lele^]

http://www.chaosgroup.com/forum/phpB...=169379#169379

Confront this topic on the usage of the Dome light (it has a couple more links inside, worth checking out, imho)

[MoonDoggie]

What kind of HDRI image are you all using in your interiors? A sky? some other interior? What? I'm curious.

Colin

[MoonDoggie]

Bah, I was reading "exteriors" as "interiors" clearly my mistake! Now I know why that question didn't make any sense to me.

[Dschaga]

sIBL (smart Imagebased lighting) is a way to go when you try to create your own, personal exterior hdri's with moderate expensive hardware.

Blochi and me developed many many years ago ( when 1.5 rc1 came out :P ) a pipeline tool which worked pretty well for us with animations and stills..

Here how it works:

1. Take an hires hdri(can also be an hdr with less fstops), reduce it to a small size and blur it a little bit (for fast rendering and low memoryconsumption) and let the hdri only cast the light and shadow of the sky.
2. Take the hires hdr and reduce it to a usefull solution where you still can see details and use it for the reflections.
3. Then take a keylight for the sun to have full controll over the suncolour, shadow and shadowcolor, brightness...
4. Then take an huge image/pano to render the perfect BG.


more info and examples here:
http://www.hdrlabs.com/sibl/index.html

We do offer scripts for max, lw, maya, c4d, modo(...) to load our sIBL's which we also offer for download.

:]

[mdi]

Dschaga, that looks intresting....does the script automaticaly place the sun/light at the most intense part of the hdri aswell, or is this simthing you need todo?

Also, when eveything is set up, what happens if you rotate on of the HDRI maps, does eveything else update?

[Dschaga]

The script uses a settingsfile where the UV location of the keylight is stored. When you load an sIBL it knows where to place the keylight in converted XYZ coords.

When i started to code this script it was an extended compass helper, which loads the sIBL and keep all images in sync.
The script is now only an imageloader and not a script which uses callback code to sync the loaded images. The reason for this is that we want to keep things similar on all plattforms with all renderers.

[stanslavov]

big 10x all - comming soon i will be post my resuts