Search found 3 matches

by mgamito
Tue Dec 06, 2016 9:25 am
Forum: General Development
Topic: Confused about near-specular reflection that is not energy conserving.
Replies: 4
Views: 5108

Re: Confused about near-specular reflection that is not energy conserving.

Hi, I see what you mean. Basically, point lights and other delta lights use units of irradiance, instead of the more conventional area lights that use radiance. As such, delta lights cannot be plugged into the direct lighting equation because they don't obey the correct units. As you suggest, the pr...
by mgamito
Fri Dec 02, 2016 2:10 pm
Forum: General Development
Topic: Confused about near-specular reflection that is not energy conserving.
Replies: 4
Views: 5108

Confused about near-specular reflection that is not energy conserving.

Hello, I've been puzzled by a lighting problem that is giving non-intuitive results. I'm sure the answer must be very simple because this is really basic stuff. Consider a ground plane with a near-specular brdf. The brdf is going to return extremely high values close to the mirror direction that dro...
by mgamito
Fri Feb 13, 2015 3:30 pm
Forum: General Development
Topic: Russian Roulette for terminating volumetric ray marching?
Replies: 2
Views: 3608

Russian Roulette for terminating volumetric ray marching?

Hello, I have a question about how to implement Russian Roulette termination while marching a ray through a volume and accumulating transmittance. The only example I've found on how to implement this is in the Physically Based Rendering book. In there, the following code snippet is included in the r...

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