Unwanted lensing effects

[N-drju]

Hello in 2017,

I am currently dealing with a little nuisance - I am trying to create several objects covered with glass domes (made from spheres that are cut in half by opacity settings). I would like to plant some objects within the domes too, but i have a problem with the way Terragen renders objects inside...

When rendering, objects placed underneath the domes tend to get spherically distorted. Much like they were under the lens. This is caused due to the spherical shape of the dome itself but I would like to see the objects inside exactly as they are "in reality". I mean... if you look through the glass, even spherical one, you can see everything straight right? Take a look at the picture to see what I mean and what is wrong:

[attach=1]

Please help me with this little issue. And all best in the New Year!

[j meyer]

You have to check 'Double sided surface' in the glass shader to get that effect.

Same to you.

[swissAdA]

Use: Decay distance: 1e+099

[N-drju]

Well, none of the above does the trick...

Double-sided surface basically floods the insides of the dome with a mysterious, steel-colored blob that obscures everything that's inside...

[attach=1]

Increasing the decay distance is even worse. It doesn't eliminate distortion. Also, it de-colorizes entire dome, making it featureless and milky white.

[attach=2]

Other ideas?

[KlausK]

Can you upload a tgo file of the scene, perhaps?
That would be easier for `outsiders` to check everything else as well...
Maybe it has something to do with the objects you are using.
cheers, Klaus

[Hannes]

Have you tried a IOR of just a little more than 1? Something like 1.01?

[Hannes]

And your glass object shouldn't cast shadows.

[KlausK]

This works like you want it, I think (see attached pictures). Take a look at the settings of the glass shader.
Turn off "Cast shadows" of the object with the glass surface like Hannes said.
And set your "Index of refraction" to something like 1.00x. Has also been said.
Look up "Index of refraction" if you do not know what it does. Basically, the higher the value
the more distorted (refracted) the object behind the glass will appear. Yours is set to 1.5.
That has an influence on everything the glass shader does.
cheers, Klaus

ps: The tree is the "Red Oak Fall" model, courtesy of Marc Gebhart.

[N-drju]

Thank you very much for your support. It worked.

One comment though - the "Visible to other rays" in the sphere object box should also be unchecked. Otherwise there might be a black rim going around the middle part of the dome.