"Bald Eagle" <cre### [at] netscapenet> wrote:
> "Cousin Ricky" <rickysttATyahooDOTcom> wrote:
>
> "I'm rendering the shadowy part
> separately with area lights, then splicing that into the main scene."
>
> Very cool lenses!
> How does one do this splicing thing of which you speak?

In years past, with GIMP or Micro$haft Paint, and lots of tedious counting of
pixels.  This time, I'm doing it entirely in POV-Ray, compositing the final
image with image maps of the earlier renders.

Here is a snippet of the code:
  ____________________________________________________________________

  #declare SAFETY_MARGIN = 0.005;
  #declare S_INSET_NAME = "cgs-convex_stack-inset.png"
  union
  { plane { -z, 0 }
    object { RC3Embossed_Message (2014) translate <DIM - 30, 25, 0> }
    #if (file_exists (S_INSET_NAME)) // soft-shadow inset
      #debug "Inserting soft-shadow inset.\n"
      box
      { <0.30, 0.15, -1> + SAFETY_MARGIN, <1, 0.29 - SAFETY_MARGIN, 0>
        pigment { image_map { png S_INSET_NAME } }
        scale <DIM, DIM, 1>
      }
    #else
      #debug "Soft-shadow inset image not found.\n"
    #end
    pigment
    { image_map { png "cgs-convex_stack.png" }
      scale DIM
    }
    no_shadow
  }
  ____________________________________________________________________

The inset file is created with the command line options:

  +sc0.30 +sr0.71 +er0.85 declare=Soft=1

and

  +ocgs-convex_stack-inset

The Soft variable turns on the area light.  The SAFETY_MARGIN (more than)
accounts for any pixel rounding from the partial render.  The macro
RC3Embossed_Message creates the copyright notice.

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