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Re: Importance sampling and sharp shadows in IBL

Date : Thu, 19 Apr 2007 14:13:01 -0400

To : XSI(at)Softimage.COM

From : Chris Johnson <chrisj(at)topixfx.com>

Subject : Re: Importance sampling and sharp shadows in IBL

> I don't see the point of using an HDR image to create sharp shadows. Ray tracing lights are made just for that.

Your using the HDR Map to tell where the shadows should be coming from in a real world scenario using the intensity of the image to calculate the intensity of the shadow as opposed to having to use a light and guesstimating where it should be.

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Follow-Ups:
- Re: Importance sampling and sharp shadows in IBL
  - From: André Adam <a_adam(at)49games.de>

References:
- Importance sampling and sharp shadows in IBL
  - From: Dawa <dawa(at)topixfx.com>
- Re: Importance sampling and sharp shadows in IBL
  - From: Francois Lord <francoislord(at)gmail.com>

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