Basic question: reflections with glass sphere

Practical and theoretical implementation discussion.
asyrov
Posts: 9
Joined: Mon Oct 12, 2015 9:38 pm

Basic question: reflections with glass sphere

Postby asyrov » Wed Jan 06, 2016 12:12 am

I'm having issue comparing how light is reflected in my hobby ray tracer and real life for a transparent glass sphere. As I understand, all the light reflected from a glass sphere is due to Fresnel reflection and so for highlighted on the image area it should be (where appears angle is less than 20 degrees) about 0.04, which means it should be very transparent place. But it, actually looks very reflective there. Can anyone please advice what I'm missing here?

[img]glass%20ball1.jpg[/img]
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glass ball 1.jpg
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friedlinguini
Posts: 79
Joined: Thu Apr 11, 2013 5:15 pm

Re: Basic question: reflections with glass sphere

Postby friedlinguini » Wed Jan 06, 2016 12:56 am

The light source is much brighter than the surface behind the sphere. Radiance in the real world doesn't max out at RGB 1,1,1.

asyrov
Posts: 9
Joined: Mon Oct 12, 2015 9:38 pm

Re: Basic question: reflections with glass sphere

Postby asyrov » Wed Jan 06, 2016 5:38 pm

Thanks for help, it works now. I changed color values of surfaces to lower values (say from {1, 1, 1} to {0.1, 0.1, 0.1} for white) and the reflection popped up.


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