Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: lhenix on 2014-03-30, 10:29:02

Title: Bug?Corona mtl's translucency...
Post by: lhenix on 2014-03-30, 10:29:02
why?

Is this a bug?use translucency,but get this result,outside brightness,inder is dark....

use corona light,type sphere....
Title: Re: Bug?Corona mtl's translucency...
Post by: maru on 2014-03-30, 10:39:45
Does your mesh have thickness?
Title: Re: Bug?Corona mtl's translucency...
Post by: lhenix on 2014-03-30, 10:42:31
vray not like this
Title: Re: Bug?Corona mtl's translucency...
Post by: Ondra on 2014-03-30, 12:10:28
try using more diffuse and less translucency level
Title: Re: Bug?Corona mtl's translucency...
Post by: Ludvik Koutny on 2014-03-30, 12:43:50
vray not like this

You transmit more light than you reflect back. It is simple and makes sense. Just decrease translucency fraction value to change balance between transmitted vs reflected light. And yes, true... Vray is not like Corona. We do not have 20 different semi-interdependent knobs just to set up basic sampling ;)
Title: Re: Bug?Corona mtl's translucency...
Post by: lhenix on 2014-03-30, 16:16:23
rebuild this object and flip normals,but..........
Title: Re: Bug?Corona mtl's translucency...
Post by: romullus on 2014-03-30, 16:23:33
nvm
Title: Re: Bug?Corona mtl's translucency...
Post by: maru on 2014-03-30, 16:27:35
Why are you using translucency = 1. Tried 0,1 or 0,3 first?

And if your geometry has thickness, then I think there might be some heavy bouncing taking place inside of it.
Title: Re: Bug?Corona mtl's translucency...
Post by: lhenix on 2014-03-30, 16:42:08
Why are you using translucency = 1. Tried 0,1 or 0,3 first?

And if your geometry has thickness, then I think there might be some heavy bouncing taking place inside of it.

tried
Title: Re: Bug?Corona mtl's translucency...
Post by: Ludvik Koutny on 2014-03-30, 16:45:37
Your translucency color is white...  so translucent component will be white... if you need translucent color to be same as diffuse, you need to put same map into translucency color as well...
Title: Re: Bug?Corona mtl's translucency...
Post by: lhenix on 2014-03-30, 17:01:45
Your translucency color is white...  so translucent component will be white... if you need translucent color to be same as diffuse, you need to put same map into translucency color as well...

Thx~!translucency fraction set 0.3,and translucent color used same as diffuse bitmap,it looklike normal
but set translucency fraction to 1.0,the object innerside can't receive lights,still dark than outsid,why?
Title: Re: Bug?Corona mtl's translucency...
Post by: maru on 2014-03-30, 17:47:24
but set translucency fraction to 1.0,the object innerside can't receive lights,still dark than outsid,why?
As Rawalanche said, it means all light is transmitted to the other side, no light is reflected. This is not realistic. In Corona you should keep everything as realistic as possible.
Title: Re: Bug?Corona mtl's translucency...
Post by: Ondra on 2014-03-30, 21:50:27
not a bug, normal behavior - you need to play withthe translucency value
Title: Re: Bug?Corona mtl's translucency...
Post by: lhenix on 2014-03-31, 02:18:29
ok,thanks of all my friends!