enter image description here I am new to using blender and I am working on rendering a scene that uses portal lighting, but I am having some render issues and I don't know why. Is there anything I can try to fix this issue?

Denoising didn't seem to make a difference on the picture cloudiness one way or another. Adding more samples helped a lot, but I still have that issue some.enter image description here

Here's a link to my blender file https://drive.google.com/file/d/1uNfl7msr-o_v0AR5WSfbMFfdvP_zo2Ly/view?usp=sharing

Thanks everyone, the advice was very helpful! For anyone else having this problem, try the advice below and primarily lower the number of your light sources in the scene.

  • 1
    $\begingroup$ Looks like denoising or clamping to me $\endgroup$
    – WhatAMesh
    Commented Sep 26, 2018 at 8:59
  • $\begingroup$ Try increasing the samples $\endgroup$
    – rob
    Commented Sep 26, 2018 at 9:46
  • $\begingroup$ Thanks for the feedback! Sampling helped some, but it didn't fix the problem. What else could I try? $\endgroup$
    – Trent
    Commented Sep 26, 2018 at 10:11
  • $\begingroup$ Hi Trent, could You provide us a .blend file please? $\endgroup$
    – Jan Matys
    Commented Sep 26, 2018 at 13:29
  • $\begingroup$ Heres a google drive link to the file drive.google.com/file/d/1uNfl7msr-o_v0AR5WSfbMFfdvP_zo2Ly/… $\endgroup$
    – Trent
    Commented Sep 26, 2018 at 16:48

1 Answer 1


first of all, in the archive you've sent i haven't found any portals.. to set them properly you shoud get an area lamp and not a sun one.

like this:example1

second, i recommend you to reduce the light bounces, its better for performance and i think it may help with some of the noise:


the denoiser effect may be too strong, i'd leave it in the default settings, besides 8 radius costs a lot of performance..

A big part of the problem can be because there is too many light sources.. i don't know how you could fix this.. but from what i already said im pretty sure you'll get better results

  • 1
    $\begingroup$ Thank you. I forgot I changed my portals to sun lights. I thought the portals were the issue at first. Ill definitely try what you suggested. I also change my material properties and that has helped too. $\endgroup$
    – Trent
    Commented Sep 26, 2018 at 23:39

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