Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: HTKsean on 2019-03-13, 17:08:01

Title: No Texture on backside of glass
Post by: HTKsean on 2019-03-13, 17:08:01

I'm having a problem texturing glass material. Example: a 1" thick glass table top with all sides smooth except the bottom which has bump texture applied. The glass top renders as though there is no texture at all. Smooth glass all around. However, moving the camera to view the bottom of the glass directly and the texture renders. Move the camera up to view from the top, the texture disappears.
A bug in Corona? or just a setting that I'm missing?

BTW, same result using displacement
Sean

Title: Re: No Texture on backside of glass
Post by: romullus on 2019-03-13, 17:10:14

Can you show your material setup? Did you use Corona layered, blend or multi-sub material for the glass?

Title: Re: No Texture on backside of glass
Post by: HTKsean on 2019-03-13, 17:14:01

Just using basic Corona material with refraction set to 1.0.
Just noticed that if I check "Thin(no refraction), the texture renders correctly.

Losing the refraction is not very helpful when rendering 1" glass.

Sean

Title: Re: No Texture on backside of glass
Post by: romullus on 2019-03-13, 19:18:15

Quote from: HTKsean on 2019-03-13, 17:14:01

Losing the refraction is not very helpful when rendering 1" glass.

I agree, but why then set refraction to 1.0? This is basically the same as turning off refraction. 1.0 is refraction index of vacuum, 1.5-1.6 is typical refraction index of glass.

Title: Re: No Texture on backside of glass
Post by: maru on 2019-03-14, 15:53:20

I would have to see an example render to understand what is going on here.

Quote from: romullus on 2019-03-13, 19:18:15

I agree, but why then set refraction to 1.0? This is basically the same as turning off refraction. 1.0 is refraction index of vacuum, 1.5-1.6 is typical refraction index of glass.

I think he did not mean refraction IOR, just refraction level.