Internal images Vray physical sun/cam

[alfienoakes]

Just a quick question..

 

I am just wondering how people are getting on using the Vray physical sky and physical camera for INTERNAL shots. I have no real problems with externals, but it seems that to get good results for internals requires at least 1 or 2 little tricks still.?

 

I would imagine the reason for this is that, if you were to take a photo of an interior, you would struggle to get good exposure both inside and out, unless you started using flashes or false lighting..?

 

It would be interesting to hear from others, to see if it is just me, as I am thinking of ditching the physical camera to try and achieve the results I am after.

[Eric Sosa]

hey andy.

 

I always use physical cam for my interiors with vray sun entering the place. I start with a shooter speed of 2.0, which gives me, more or less, the same ligth parameters as the standar cam.

 

from there I play with the shooter speed & ISO until I get a reasonable good shoot. after that i adjust my vraysetup for a good luminated render. it's all a compromise between amount of ligth vs shoot speed.

 

thx for the tip bout the proxis...btw

 

cheers...Eric

[alfienoakes]

Hey Eric..

 

Glad they worked..

 

I have set up 2 scenes, both identical test scenes to try and see how best to use the physical stuff for an internal. I am testing a few different ways to try and achieve the same results.. some hopefully better and easier than others..! I used to use the "old" method of direct light, vray planes and a standard camera, and was happy with the results.

 

I have seen so many new ways of achieving some great results. These include:

 

Vray physical camera and vray sun with vray planes inside the windows. (bit old school and new school mix)

 

Vray physical sun and standard camera, sun reduced to suit.

 

Lele's method of vraycolourmap .255 and the physical camera and sun.

 

Vray physical camera and sun with standard vraymtl.. to name a few.

 

All seem to produce great results, in the right hands. But, there is a definite lack of tutorials on how to use the physical camera within vray, with regard to real world. You have to really go and look into how a real camera works. Well this is OK if you also understand how real materials work, and then how they work in Vray..

 

Then there is LWF to consider, (something which I now try and use)

 

Im not trying to trick anyone into giving away all there secrets by any means.

 

Really I was just wondering how people were getting on with these new features.

 

As an example, I was using the physical method on externals, and getting poor results.. acceptable.. just. Then someone pointed me in the direction of the "sunny 16" rule, and all of a sudden it became a lot clearer.. and the images looked 100 x better.

 

Or are people just resorting back to what they know.. good old direct light, standard camera and vray planes...?

[Trevor Tizard]

Hi Andy,

 

I have recently been going thru the same exercise, although I'd not done internals previously.

 

I too have found very little in the way of tutorials for this method, although have seen some outstanding work on the Vray forum. I also requested Vlado update the internal tutorial in the help files to include the physical camera. Hopefully that will turn up before too long, but I know he's a busy man!

 

I resorted to just setting up a simple scene and testing different settings. I did start with some advice from a collegue who's into photography as to how he'd set up, and then adjusted from there until I got something I liked and he agreed looked correct.

 

I think it's also important to remember that this is attempting to emulate an image you'd get from a camera, and not the eye. Also for an architectural photo shoot there would likely be lots of flash fill and reflectors, so don't rule out additional lighting to get a look you're happy with.

 

There is a discussion on the Vray forum at the moment about using Vray lights in portal mode for internals.

 

PS thanks for the hording info. feel free to PM me if you want to discuss internals further.

[Eric Sosa]

hey andy.

 

I made this render with vray physical cam, vraysun and vray planes

 

[ATTACH]24216[/ATTACH]

 

I'm certainly not an expert, but you can find a small tutorial (description of this kind of escene) I made at vraymaterials.de, including vraysetups.

 

hope it helps.....Eric

[alfienoakes]

Hi Andy,

 

I think it's also important to remember that this is attempting to emulate an image you'd get from a camera, and not the eye. Also for an architectural photo shoot there would likely be lots of flash fill and reflectors, so don't rule out additional lighting to get a look you're happy with.

 

Exactly.. Once you get your head round that, I think its probably easier. If its physically correct your after, then it might not be the best looking image in terms of a visual..

 

Will PM you at some point.. cheers trevor.

 

ERic.. seen your stuff over on that forum.. hope to have a look in more detail tonight..cheers..