Announcement

Collapse
No announcement yet.

aa, noise problem

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • aa, noise problem

    pretty new to vray, trying to dial in some decent settings, any suggetions on how to eliminate this noise in the glossy reflection, and the AA??

    this frame renders out at now at about 2 minutes, with IR/LC

    light source, Envr=0n(ambient), and (1) vray light sphere(shadow casting)
    thanks


    Click image for larger version

Name:	vray q.jpg
Views:	1
Size:	400.5 KB
ID:	869715
    Last edited by pipjor; 24-04-2010, 11:29 AM.

  • #2
    For the completely white area at the foot of the bed in the color mapping options turn on "Sub-pixel mapping" and "Clamp output".

    To figure out things like the little specs easily (well, relatively) yourself you should do this.

    Turn on the VRay Frame Buffer
    Add in Render Elements "VRay Lighting, VRay Specular, VRay Reflection/Refraction, VRayGlobalIllumination", then when the image is done rendering in the VRayFrame Buffer, drop down each element and find out where the speckles are appearing, this should point you in the right direction
    Colin Senner

    Comment


    • #3
      Looks like a specular problem - agree with sub-pixel and clamp output to get rid of that overexposed reflection...to get better quality in your specular:
      1. Use higher value than default 8 subdivs in your wood material Reflection tab - try 12 or higher
      2. The all important image sampler: Use adaptive DMC, uncheck "use DMC sampler thresh." and lower the Clr thresh to get the quality right (default is 0,01 which should be fine in most cases - but if you really need to get a near perfect look - lower that setting)
      3. Use Irradiance map and Lightcache to get smooth results - brute force will give you that grainy look if you don't use high quality settings..
      Visit my blog: http://philipnel77.wix.com/raywire

      Comment


      • #4
        Good call pnel, but like you said that is clearly spec or reflection grain. Try my suggestion and you should be able to easily figure out where the noise is coming from, and then if you need further help on reducing it, with that knowledge we can help better
        Colin Senner

        Comment

        Working...
        X