What's with this reflection problem

Comments

• GFHEL Posts: 24

  November 2012 edited December 1969

  The camera needs to have the same field of view as the angle of the spot light. Which turned out to be tricky to adjust because the camera setting only accepts values for the focal length.

  But fortunately Casual reveals in an archive thread the relation between focal length and field of view for a Carrara camera: http://forumarchive.daz3d.com/viewtopic.php?t=175284

  The formula finally collapses to: Focal Length = (21,677 / (tan (Spot Angle / 2))

  So a spot angle of 140° would correspond to a focal length of 7,9 mm.

  The render output must be quadratic. I disabled visibility of everything but the mirror and rendered with a white background. For using the render directly, the Invert Color box must be ticked in the spot's Gel adjustments.

  

  

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• GFHEL Posts: 24

  November 2012 edited December 1969

  Light Brightness and Light Cone Intensity are set higher than I would expect for a physically correct render, but otherwise the effect would be to feeble to stand out clearly.

  

  

  Secondary_light_cone.png

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• GFHEL Posts: 24

  November 2012 edited December 1969

  Because the Gel Map accepts a video as well as a still, the whole thing can even be animated. (Hope the GIFs work.)

  

  

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  Mirror_Reflection_Mask.gif

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• madinyu_aff05f0b83 Posts: 16

  December 2012 edited December 1969

  Hey Guys.
  Someone can help me please?
  I create a mirror, everything was perfect, just the resolution of mirror is horrible.
  How to increase the mirror reflection resolution?
• evilproducer Posts: 9,040

  December 2012 edited December 1969

  Care to give some examples or explain how you've set up your scene?
• Garstor Posts: 1,411

  December 2012 edited December 1969

  madinyu said:

  Hey Guys.
  Someone can help me please?
  I create a mirror, everything was perfect, just the resolution of mirror is horrible.
  How to increase the mirror reflection resolution?

  I concur with evilproducer. Some information on your scene setup would be helpful.

  I created a throw-away test scene that included a quick-and-dirty mirror on a wall. If I recall correctly, the Reflection Channel is set to about 95%. While it certainly acts like a mirror there is a distinct lacking in what is visible in the mirror versus the rest of the scene. Frankly, I think it made it look better.

  

  

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• madinyu_aff05f0b83 Posts: 16

  December 2012 edited December 1969

  Thanks Guys, finally i found the solution:
  Just, in the render tab, redoucing the 'shading rate' under 0.10, and the resolution now is perfect!

  Thank's for your reply!