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[SOLVED] How is an image rendered in IRAY?

mdingmding Posts: 1,217
edited June 2022 in New Users

Hi everybody,

If i set rendering quality to 10 and converged ratio to 99%, after like 70% rendering do i have a rendering quality of 7 with 99% converged ratio?

Post edited by mding on

Comments

  • prixatprixat Posts: 1,588

    It means 70% of all pixels have reached the 'quality' you set, the other 30% need more iterations.

  • mdingmding Posts: 1,217

    Thanks a lot @prixat! I had hoped to get a feeling for which rendering quality to choose for certain scenes, but if after 70% i only know that 70% of pixels have reached the chosen converged ratio + rendering quality, that makes it of course more complex lol.

  • prixatprixat Posts: 1,588

    I have never had the need to raise quailty above 1.

    What sort of scenes are you doing? surprise

  • PerttiAPerttiA Posts: 10,015

    prixat said:

    I have never had the need to raise quailty above 1.

    Neither have I 

  • mdingmding Posts: 1,217
    edited June 2022

    It can make a difference with organic textures, like human skin and leaves of plants for example.

    Edit: Also with fabric like a knit sweater.

    Post edited by mding on
  • mdingmding Posts: 1,217
    edited June 2022

    Well, for what i did now the long render time seems to have been completely wasted lol. Still with closeups i have seen differences, and in DAZ (shop) tutorials i have seen higher quality values like 100.

     

    t1.png
    1200 x 1200 - 1014K
    t2.png
    1200 x 1200 - 1M
    t3.png
    1200 x 1200 - 1M
    Post edited by mding on
  • Richard HaseltineRichard Haseltine Posts: 99,543

    The render Converged Ratio looks at how many pixels are converged, the Quality sets the tolerance for convergence (there is no absolute done value with an engine like Iray)

  • mdingmding Posts: 1,217
    edited June 2022

    Richard Haseltine said:

    The render Converged Ratio looks at how many pixels are converged, the Quality sets the tolerance for convergence (there is no absolute done value with an engine like Iray)

    Thankyou  @Richard Haseltine! Your post nudged me to this thread:

     https://www.daz3d.com/forums/discussion/58275/what-is-convergence/p1 

    where you went a bit more into detail. If i understood it right:

    Render quality: how many steps of calculation do i want to invest to get closer to a not reachable perfect final result.Every step takes the same amount of time but yields less and less improvement.

    Converged ratio: how many pixel shall meet the standard set by render quality. [EDIT] The lower the quality setting, the higher converged ratio should be.

    Well that makes a quality value of 100 not sound very worthwhile... Thanks again!

     

    Post edited by mding on
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