OTOY Forums

I played around with dispersion and wanted to make a render of a colourful refractive software logo when I stepped on a problem.
It seems like that light rays are refracted in the wrong direction. At first I believed I must have done something wrong. But several tests seemed to approve that octane handles refraction wrong.

In the picture below the light rays should be bend down instead of up.

As material for the prism I used standard specular. I just cranked up dispersion and turned of reflection.

I would like to attach the .ocs file but it doesn't seem to work.

It says "The extension ocs is not allowed."
Hm, I thought it is possible to attach an octane file to a post. Maybe someone knows how this can be done?

that an odd problem-

Are all of the prism´s normals facing outwards?
Have you choosen the correct index of refraction? Glass must be between 1.440 and 1.900

Zip or Rar file should work.

ok, that's embarrassing. The normals where pointing inside. Stupid me!
Thanks cornel for the quick help!

you`re welcome.
95% of all octane problems are caused by inverted normals or wrong scale. The remaining 5% are sitting in front of the monitor.

cornel wrote:you`re welcome.
95% of all octane problems are caused by inverted normals or wrong scale. The remaining 5% are sitting in front of the monitor.

Actually 3% is caused by sitting in front of a monitor.
The remaining 2% is Brain fade caused by a lack of strong black coffee

Nice model though, I wouldn't mind a copy of that to play with.

Now it looks like expected!

@steveps3: the model is quite simple but maybe the lamp is a bit tricky. Here you go.

I've tried rendering a prism before but without any luck.