Is precalculated light cache or GI independent of exposure?

[JD3D_CGI]

I want to have a shot where the camera pulls out of a room to an outside courtyard - I want to precalculate the light cache and do two renders at different exposures so they can be edited.

Silly question: But will one light cache calculation work? ie is it holding brightness values in and of itself, or is it just a value the renderer can read itself?

TLR Does lightcache work at any exposure?

[joconnell]

Yep, light cache is driven by the intensity of the lights hitting it so if you don't change your light brightness to do your exposure change and instead use the physical camera shutter you'll be fine.

[JD3D_CGI]

Thanks a bunch.

I wonder, what is the best way to render inside to outside?

Just animate the exposure?

best

[joconnell]

Yep, that's what camera men have to do when filming. They use lenses that don't have any "click" at each aperture setting so when they walk from inside to out, they have two settings that they've measured for the aperture and then just smoothly change from one to the other. If you're using depth of field and motion blur at render time and want to keep a very soft focus look, you can also animate the ISO setting to get the same control over brightening / darkening.