vray cameras???

[jacksc02]

ha ha!

[UBIKmh]

Someone ever thought about doing a virtual light meter? I used to do a lot of architectural photography and that would've been totally impossible without good light meters.
I think it's an insane job to figur out exposures with a trail and error method; it's like going back to the mid 19th century in photography. With trail and error lighting it takes ages to figur out lighting for a whole year day round and then you get a project at a very different geographical location and you can start again.



Marc

[jacksc02]

marc- Lele has done an exposimeter script which is similar to a virtual light meter. It basically renders 6 increments of the same image and calculates what your shutter speed or ISO should be.

[ene.xis]

dinamicly increase or decrease physical camera s exposure while rendering would be gr8....imo
but yeah Lele s exposimiter is a quasi-perfect workaround too

[^Lele^]

The script renders a small (user-selectable. small is always more than good enough) image with very fast settings to evaluate light distribution in 4 chunks of the image.
Very much like the matrix exposure in dSLR cameras.
You can customise weights for each part as well as brightness ranges to take into account.
It supports auto-White-Balancing, custom presets and animation.

Have a go at it, it's in the script pack (fresh post in the OT section)

[jacksc02]

good boy lele

[glorybound]

Shutter Speed

When is shutter speed of 1000 - 1250 real world? Do you mean 100 -125? I am using the .255 method, or a least I thought I was. If you go through those videos he is doing the same thing. His shutter speed in the demon example was around 16 I think.

[^Lele^]

I left the settings for the camera at defaults.
Mind you, i never meant for the camera to be REAL-LIFE ACCURATE, only for it to expose properly and for light to look good (and withing the 0-1 range if at all possible/wished for).

And i played with the ISOs only, not with the shutter speed, not to confuse anyone (shutter speed is reciprocal of 1, ie. 1/125), so to double exposure you'd have to halve its number, which may be counter-intuitive to someone, whereas for the ISOs it's pretty straightforward.

Lele

[giraffe]

I want to tell one practical good benefit of vray camera for arch-viz scenes.

if u have a site and u setup ur lighting. and if u need few camera shots:

in this case, with standard cameras I almost had to setup my lighting again, for each camera-to get nice views.
but now, if u make good lighting, then all u need to do is adjust the parameters of camera for most of the shots.
of course if u have a camera looking from opposite direction, in this case u will need to make a different setup.
but for many shots, only one light set-up and then tweaking camera parameters is enough.

so like the real world as in photography.
this is gr8 benefit for arch scenes.

[UBIKmh]

Hey, that's cool, I will look into the matrix script. I promised some people to do a lecture on architectural photography at a 3d user event, could be a plus when I can make a direct link with Vray Ph cam, Sun and sky; translate the real world technology to the virtual.

Marc

[pskdude]

hmm

sounds like that would be interesting done know if half the people in the room would know what your tlaking about but hey knock them socks off..