OTOY Forums

It would be great to have the ability to have the termination color other than black in the Specular Material. Having environment, map or color options would be very useful.

what do you mean with a termination colour ?

Radiance

Right now if you run out of specular bounces in a glass material the resulting color is black in those refraction areas where there is nothing in the scene to react to. This is similar to reflection mapping but would like refraction mapping other than the default black. So, minimally would like to have the black replaced with an image or the scene environment.

Here's an example of the effect. The top image terminates with a HDRI...the bottom terminates with just a dark color or black.

Thats the same as a ray exit color, right?

face

Hi,

Aren't these techniques 'passee' ?
They produce an incorrect image.

Radiance

face wrote:Thats the same as a ray exit color, right?

face

Yes, correct.

radiance wrote:Hi,

Aren't these techniques 'passee' ?
They produce an incorrect image.

Radiance

Yes and no....they produce an enhanced controlled realism. But as it is, if there is a white color for the texture environment, a glass object still has black areas where the termination/ray exiting occurs regardless of where speculardepth is set. It should be white or what-ever the environment image is along with what-ever objects are present to be included in the refraction.

Right now all I get is black...which is not really correct. But most importantly, not very attractive.

Pauls wrote:

radiance wrote:Hi,

Aren't these techniques 'passee' ?
They produce an incorrect image.

Radiance

Yes and no....they produce an enhanced controlled realism. But as it is, if there is a white color for the texture environment, a glass object still has black areas where the termination/ray exiting occurs regardless of where speculardepth is set. It should be white or what-ever the environment image is along with what-ever objects are present to be included in the refraction.

Right now all I get is black...which is not really correct. But most importantly, not very attractive.

yeah, but this is to be adressed in 2.3 with MLT.
It will focus on long paths and mutate those.

Radiance

Good deal...thanks for taking the time to let me know.

So this means no more black glass with MLT or what?

Chris.