Problem when using Dome with Vraylightmtl for background

[michaelfountouklis]

Hello forum,

 

I am quite new here so i would like to say hi from Greece to you all!

 

I have recently tried for the first time to lit a scene using a dome (from a sphere that i cut the bot part and flip normals) with a Vraylightmtl that has a bitmap of the background on it.

I took out the vray sky from the environment settings and left them blank.

 

I played with the vraylightmtl intensity to achieve a well lit background and give light to the scene, my only problem is that there are no direct shadows on objects. The scene is like an extremely cloudy afternoon. Is this natural? How can i get my vraysun to still give shadows on objects.

I didn't change any settings during my experimentations.

 

I don't know if this is stupid but i tried to bring the sun inside the dome, i thought it might help, but it didn't seem to affect anything.

 

Anyone any suggestions?

 

The scene that i am trying to lit is an outside scene of a 4-story building with vegetation and surrounding area. The camera is a vray camera.

 

Thanks a lot!

[abhaysingh]

Hi Michael,

How are you ?

So if i am right, you have 2 sources of light in your scene.

1)Hemisphere with vraylight material &

2)Vray sun.

 

Can you post screen captures of vraysun, vray physical camera settings and your scene ?

I want you to hide hemisphere environment(vray light material) & make sure it is not lighting up the scene.Now just try to render your scene with vray sun and try to increase its intensity till you get some good light.I think it has to be either vray physical camera setting or vray sun intensity.

Let me know your results.

Edited October 16, 2012 by abhaysingh

[RyderSK]

Click on your hemisphere, properties/general, and un-check "inherit visibility, cast, recieve shadows".

 

Though your whole approach is wrong and pretty oldschool. Just use VrayDomeLight instead.

[abhaysingh]

But Michael said he tried to bring vraysun inside dome.

[michaelfountouklis]

Abhay, i am good, thank you for the quick reply!

 

Here is a pic of camera settings:

 

 

here is a picture of the VraySun settings:

 

 

You are right, there are two light sources in the scene. I try to use the dome in order

to get better lighting, and it had the effects i needed, but somehow i cant get the shadows to work.

Here is the Vraylightmtl settings

 

 

and fianly this is the rendered preview, where you can see for instance that no objects (trees walls etc) cast shadows anywhere in comparison to before i put the dome. Above that i get some blackish spots on my white walls that were not there before.

 

 

 

 

Hope this helps! I dont have much experience with using domes with vraylight materials.

[michaelfountouklis]

Thank you both for your replies.

 

Juraj, this helped, thank you!

I know its old school, i dont have much experience on this kind of lighting techniques so it makes sense that i

use them first! Why you say vraydomelight is better?

[Umesh Raut]

vray dome light will do the exact same but without the problem you had, pal. It acts like a hemispheric dome around your 3d scene. And by placing an hdr (with bright sun in it) in its map channel, you'll be able to get the shadows too. Also, you get to rotate the sun (or the light source, so to speak) to your liking in the scene by going to its instance in material editor. Of course it'll need a little practice on your part.