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iRay Render - Optimisation: Max Path Length ?

ibr_remote aka infinity10ibr_remote aka infinity10 Posts: 540
in The Commons

Seeking answer as to what this is about.  Is there a reference that can tell me about it, please ?

I note it is at default value = -1

When I change it to 1, my rendered figure turns out completely black.

 

 

Comments

  • y3kmany3kman Posts: 825

    Just keep it at -1 (default; unlimited light transport path). You can read about Iray max path length from Nvidia's documentation. If you really want to use this option, set it to at least 3.

  • FishtalesFishtales Posts: 6,212

    Setting it too low and eyes also wont render properly. I keep mine at 10 which seems to be a good setting for most renders.

  • Richard HaseltineRichard Haseltine Posts: 107,968

    I think 6 is the absolute minimum for Genesis 3 eyes - I haven't checked Genesis 8, which has a modified eye structure.

  • HavosHavos Posts: 5,576
    edited October 2017

    the main benefit of a value other than -1 is that in theory your render will go quicker. Clearly 1-5 are not a good option for any render with a person in it, but 8+ should look identical (or near to) a value of -1, but render quicker. You have to try it and see

    Post edited by Havos on
  • FishtalesFishtales Posts: 6,212

    I don't know how much it speeds up renders but it speeds up the removal of fireflies.

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