Angled window refractions not working as expected

[jrozansky]

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.

[jrozansky]

Correct image. This is what I am trying to get back to as far as looking through the windows go.

[peerman]

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

Best

[jrozansky]

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

[delineator]

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.

[Peter.Chaushev]

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