Jump to content

Sign in to follow this  
JLinton

Redshift - Dark patches appearing

Recommended Posts

Hi everyone,
I was wondering if anyone had seen this happen before, I seem to be getting some dark splotches appearing in the shadows of my renders (I've circled in red). I've tried raising the below settings higher (doubling them) to see if that helps but it didnt...

Unified samples:
4min
512max
Error threshold 0.002

Sample overides:
Reflection = 512
Light 256

GI:
Brute force (primary & secondary) , bounces 2x, Rays 512

Its weird it only happens in the really dark shadows. The materials arent anything out of the ordinary either, just diffuse colours with reflection and a dome light. Unfortunately I cant share the scene file so have attached an example of whats happening.

Cheers,
Jody
 

Example.jpg

Share this post


Link to post

Hi

Can just see it in your pics the image isn't very big however the chances are its either light, reflection or refraction.

Your best to use Sampling over rides but do it with AOV passes added for reflection, refraction, GI, lighting, add all passes that are in use in your scene but these are the main ones.  Do a render and look at each AOV pass, see which pass has the issues in. Lets say it was GI, then your know where to look for sampling overrides.  If you can send the scene or part of the scene along with the dependant textures I can have a deeper look.  Id need to know what version of Redshift your using too.

 

Dan

Share this post


Link to post
  • Topic Author
  • Hi Dan,
    Sorry I didnt mention I'm rendering via render farm and for some reason when I render locally it seems to look fine to me (but then I'm only rendering locally one or two frames here and there to ensure eveything is fine). I just did a quick AOV test and the noisiest pass was "Specular lighting", not to the degree of the splotches from the render farm but maybe its that, if so which over ride do you think I need to push up to refine Specular lighting?

    I cant share the file unfortunately as the clients product isnt public yet but I've striped it right down to basic cubes using the materials from my file, plus you can see my settings for Redshift. I'm using RS 2.6.53 in C4D R20. I havent tried upping refraction so maybe thats it also?

    Cheers,
    Jody

    Test file.c4d

    Share this post


    Link to post
  • Topic Author
  • Just checked my refraction pass and its completely black so thinking its not refraction now

    Share this post


    Link to post

    Lighting is normally the one that has the most issues so try overriding it 256, 512, 1024, 2048 e.c.t/  I normally jump right up from 4096 to save time.  If it rendering fine on your own local machine then it sounds like a rendering farm issue just going by logic here as I dont use a farm.  Failing that its worth popping over to Redshift forum where there are more experts on Redshift.

    It may also be of use to look at this thread.

     

    an

    Share this post


    Link to post

    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Guest
    Reply to this topic...

    ×   Pasted as rich text.   Paste as plain text instead

      Only 75 emoji are allowed.

    ×   Your link has been automatically embedded.   Display as a link instead

    ×   Your previous content has been restored.   Clear editor

    ×   You cannot paste images directly. Upload or insert images from URL.

    Sign in to follow this  

    • Recently Browsing   0 members

      No registered users viewing this page.

    ×
    ×
    • Create New...