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3 votes
Accepted

light spectrum reflection / absorbation?

When an object is illuminated by the sun, how does the reflected spectrum change? Does each surface has an own reflection spectrum? where each photon "checks" its wavelength and "...
Kevin Reid's user avatar
  • 1,206
3 votes

Is the light emitted by a typical white pixel actually a blue-ish purple to compensate for our greater sensitivity to the color green?

Does this mean that a white pixel on a typical display actually emits the inverse of this? You're right to think that the luminance formula is related to the brightness of display elements, but it is ...
Kevin Reid's user avatar
  • 1,206
3 votes
Accepted

Direct Light Sampling produces way too bright images compared to naive diffuse bounces only

I think, the problem lies in dividing the NEE radiance by PDF (inverse area) twice. Since NEE typically uniformly samples an emitter and then samples a point (via area product measure) on that emitter ...
Enigmatisms's user avatar
  • 1,097
1 vote
Accepted

Lambertian surface and the luminous intensity

I'm not particularly educated in the formal theory of rendering / optics, so I may have something wrong, but I think I can identify the problem here: why should the luminous intensity be decreasing ...
Kevin Reid's user avatar
  • 1,206
1 vote

How is Aperture and Pixel Size accounted for in calculating received power using ray tracing?

To understand whether your steps are correct you should compare to the mathematical formulation. Step 1 is supposedly solving the rendering equation for some collection of initial rays $$L_o(x_0, \...
lightxbulb's user avatar
  • 2,226

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