Guys (n ladies!!)
I’ve never really used vray camera’s and normally just use viz cameras. However, I’ve started using them and just wondered what the benefits are over normal viz/max cameras. Also, when I render out a view using a vray camera, it renders out completely black??? if i use the same model and lighting settings using the normal viz cameras i get the rendered out view as you would expect. Any ideas why im getting a black output using the vray cam??? most confusing…
cheers
vray cameras use real world exposures so you can’t light the way you have previously. Start jacking up those light multipliers and play with your exposure settings.
Ah…do you have any values that work for you…its an exterior shot im creating…bright sunny day…about 11am…pretty cloudless sky
vray sun+vray sky, maybey?
Yeh, tried that and its like a nuclear bomb has went off..very very very bright…washes out the entire scene :roll:
with the vray camera?
just try to expose ur camera correctly then!
Lele s script pack has some gr8 tools to do so!
Do a search on the forum, man.
Tutorials, scripts, discussions, the lot.
Just up for grabs.
there he is!
:lol:
Heh…I’ll take alook…
cheers guys
Camera
I actually read several book on photography and talked to a couple photographers… then after month’s of studying I through it all out the door and realized each scene is different and I need to start with a base point and tweak accordantly.
For exteriors I use an f-8, shutter speed of 30 and a ISO of 100. I usually place a white box in my scene that will receive direct light and tweak my shutter speed until I get a rgb of 255,255,255 and a float point of 1,1,1 on that box… this gets me pretty close.
Having said this, all my materials are darkened first setting the output rgb level to .255.
Re: Camera
Bobby- for a sunny day exterior those settings (in a real camera) would be far too slow and would produce a white image.
With my exteriors my shutter speed is usually around 1000 - 1250 with an ISO of 100 and F8.
Camera
That is why I stopped trying to use real world settings. These settings constantly world for me.
sounds like you might be doing something wrong if real world settings arent working
I second what sparky says, there myst be something wrong…
look at this thread
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=20003
these are real world exposure settings
Hope that helps
Ingo
oops…i meant jacksc02 lol
ha ha!
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. :lol:
Marc
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.
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
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)