Jump to content
  • Advertisement
Sign in to follow this  

Why do we need to take primary ray pdf into account in light tracing?

This topic is 1086 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts



I'm wondering why do we need to take the pdf of primary ray into account and ignore primary ray pdf in traditional path tracing.


In a bidirectional path tracing algorithm, the connected segment won't take pdf from any point to the other because those two points are generated from more earlier points. My take on it is that it is pretty similar to light tracing by connecting light sample and camera eye point. (I didn't consider anything about finite size aperture with DOF effect, maybe it is relevant.)


Appreciate for any tips.




Share this post

Link to post
Share on other sites
Sign in to follow this  

  • Advertisement

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

GameDev.net is your game development community. Create an account for your GameDev Portfolio and participate in the largest developer community in the games industry.

Sign me up!