Exterior render (archi)

[niquedouille]

Hi everybody.
I have to do a render of an architectural project.
I have search on the forum, but no answer to my questions...

What is the best way for exterior render ?

I try vray physical cam+vray sun+vray sky, is it correct ? It's not as I want : it's too bright so I have to set the camera with extrem parameters, like f-numbers=12 or 16. The shadow don't seems to be realistics.

[SamPage]

Re: Exterior render (archi)

I am certainly no render expert (yet ), but I can tell you that when shooting outdoors (in real life) a good rule of thumb is the sunny 16 rule, which says with ISO 100, and a shutter speed of 1/100th (100 in V-Ray), you should expect to use an f stop of around f/16, and this translates quite well in V-Ray. So I don't think these numbers are extreme, but right in line with what I would expect.

As for your shadows, can you post a pic? Again, I'm not an expert, but I would suggest you use a sun light (place with the command sunlight) as opposed to the default light, and under the Environment option, set your GI (Skylight) to use material type Sky.

Hope this helps

[niquedouille]

Re: Exterior render (archi)

hi!
Very thanks to your help ! Now it works and I have solved the shadow problem. (color mapping => exponential!)

Now my problem is to make environnement reflection on material (like glass for the windows).

Here is my setting :

ENVIRONNEMENT :
GI => sky + lumiere01 (vraysun)
backgroud => sky

I have tried to change background for an hdri image, but there is no reflection.

Maybe I have missed to tick an option ?

[Micha_cg]

Re: Exterior render (archi)

Hi,

if you set the same env settings at the background, than you should see it at the reflections. But if you like to use a HDRI, keep in mind, that the exposure of the image depends on the camera settings. Try a higher intensity of the HDRI (1, 10, 100 , ..) - it should work.

[niquedouille]

Re: Exterior render (archi)

oh, thank you too !
It works fine.

parameters are :

CAMERA :
shutter speed 100
f-number 12
film speed 100 ISO

backgroud : 100000 !!! but it works (without the cam and the sun, background is ok with "1")