KeyShot Forum

Technical discussions => General discussion => Topic started by: rfollett on November 24, 2014, 10:58:34 PM

Title: Emissive materials - visible to camera - 2 sided
Post by: rfollett on November 24, 2014, 10:58:34 PM
I noticed this issue a while back. I have simple planes for emissive materials. I have visible to camera off and 2 sided off.

I get different results if I show plane from above and below - From above the plane is still visible - surely this is not correct?
Title: Re: Emissive materials - visible to camera - 2 sided
Post by: thomasteger on November 25, 2014, 04:30:54 AM
The plane or the shadow of the plane?
Title: Re: Emissive materials - visible to camera - 2 sided
Post by: rfollett on November 25, 2014, 05:26:05 AM
The plane itself... This also happened in 4.3 - I logged the issue back then.
Title: Re: Emissive materials - visible to camera - 2 sided
Post by: thomasteger on November 25, 2014, 05:32:45 AM
Turn on "two-sided" and it will be invisible.
Title: Re: Emissive materials - visible to camera - 2 sided
Post by: rfollett on November 26, 2014, 02:57:42 AM
I appreciate that - is that how it has been designed ?

If I was one sided and invisible then this is not possible when viewed from above?

Thanks for your help - I appreciate this might seem like a small issue but I am just trying to understand functionality 
Title: Re: Emissive materials - visible to camera - 2 sided
Post by: TpwUK on November 26, 2014, 03:27:35 AM
It's not so much how KS is designed but more along the lines of how polygons work. Polygons have face normals, each normal has a front and back so even if you say two sides off, you are just saying don't use both sides, just use one side instead. I assume that by still using one side that it overrides the invisibility as you are requesting one side to remain active.

Martin