Angled window refractions not working as expected

V-Ray V-Ray Common Public
1

Creating a porch using VRAY 3.6 and Sketchup pro 2018. I started to mess around with the glass window neutral settings to see what they each did and try to get a more reflective or glossy finish. After messing with these settings, I decided to go back to how they were originally, by just dragging in a new glass material and deleting the old one. For some reason though, no matter what glass material I try, the render results in this distorted image. When the light hits the panes, it refracts perpendicularly to the pane. I attached photos to hopefully help describe the issue more. Sorry that they are clearly in different stages of progress, but the issue should still convey. I also thought that it could have something to do with changing between dome light and sun, and/or changing between cpu&gpu but neither of these have an effect.

Another question I have - Do most of you use glass panes that are just a plane? or do you give your glass some thickness?

Will comment with other photo, having trouble uploading on this post.

This is the distorted image, where instead of looking right through these windows, they are refracting and showing me what is perpendicular to them..jpg
This is the distorted image, where instead of looking right through these windows, they are refracting and showing me what is perpendicular to them..jpg1500Ă—1250 297 KB

2

Does your glass have any thickness? Try to give it a thickness if it hasn’t already.

Best

3

This fixed it, thank you peerman! I guess that answers the question of what glass thickness I should use lol.

4

As a side note, if you use the fake glass (I think its under the diagrammatic category), it will do reflections, but no refractions, so you can use a single plane. Any of the glasses with refractions you’ll want to make sure the glass has two panes for the refraction to work properly.

5

@peerman and @delineator are both correct.
“Architectural” or “fake” glass materials use opacity values less than 1 and are used on single-surface windows. Regular glass uses refraction values > 1 and is applied on windows objects with certain thickness.
In one case the opacity value is lowered and you get a transparent sheet (refraction has no effect if opacity < 1), in the other you get a window volume which refracts rays based on the IOR and refraction value (realistic method).

Kind regards,
Peter