@peerman said:

Hi,

First you could change the sun angle so the shadows are more visible. I tried rendering a simple piece of glass (15mm thick) with the basic glass material from the vray library. I only changed the fog color and it worked.
I've added the skp file to this post.
Hope it works! (BTW, file is made with SU2018 and V-Ray 3.6)

Best

Thank you very much for your answer, it's very much appreciated
However I have an older version of SketchUp, could you save your file so it opens in sketchup 2015?
Thanks again

Hi, I'm quite new on this forum, I have been only a lurker so far, but decided to share with you my troubles.
I'm not advanced in Vray, I know the basics about light and materials and so far it was enough for me. Now i have a particular look in mind with current project and I struggle to achieve that look in my render.

This is how it's rendering right now:

And this is an image I have in mind:

I have tried experimenting with these two materials: colored glass and white reflective material.

For the glass I used:
Diffuse transparency val: 195
A color that varies for elements, few shades of blue.
Reflection layer
IOR 1,55
refraction color same as diffuse color
refraction transparency val: 125
I haven't done anything with the fog color because my elements are very thin and the color wasn't showing up right.
And I have 'affect shadows' checked.

For the white one:
basic standard material with the refletion layer.

I have read threads:
https://sketchucation.com/forums/viewtopic.php?f=81&t=19778
https://sketchucation.com/forums/viewtopic.php?f=322&t=43540
They were about color glass but I couldn't find what I was looking for especially for colored shadows that in these threads were mostly done using programs I don't use. I have only Sketchup 2015 and V-ray, Photoshop for postproduction.

Long story short:

1. is there a way in sketchup for these beautiful colored shadows (for thin elements)
2. what can I do to reflect color materials more without making a mirror for the surroundings, currently only reflection that shows up is from blue sky.

I wanted to post it here so maybe some more experienced eye could advice me some tools that I haven't tried. Thanks in advance for your help