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Subject: VRayShadow params
Date: Sun, 14 Nov 2010 15:36:07 +0200
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<HTML><HEAD><TITLE>VRayShadow params</TITLE>
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      <H1>VRayShadow parameters</H1></TD>
    <TD width=3D0%>
      <DIV align=3Dcenter><A=20
      =
href=3D"http://www.spot3d.com/vray/help/150SP1/index.htm">Home</A></DIV><=
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    <TD width=3D0%>
      <DIV align=3Dcenter><A=20
      =
href=3D"http://www.spot3d.com/vray/help/150SP1/examples_shadows2.htm">Exa=
mples</A></DIV></TD></TR></TBODY></TABLE>
<P>&nbsp;</P>
<BLOCKQUOTE>
  <P><A=20
  =
href=3D"http://www.spot3d.com/vray/help/150SP1/shadow_params.htm#general"=
>General</A></P>
  <P><A=20
  =
href=3D"http://www.spot3d.com/vray/help/150SP1/shadow_params.htm#paramete=
rs">Parameters</A>&nbsp;</P>
  <P>&nbsp;</P>
  <P><B><SPAN class=3Dsidenote>Search Keywords:</SPAN></B><SPAN =
class=3Dsidenote>=20
  shadow, VRayShadow, Area shadow, transparent =
shadow</SPAN></P></BLOCKQUOTE>
<H2><A name=3Dgeneral></A>General</H2>
<BLOCKQUOTE>
  <P>The <SPAN class=3Dvalue>VRayShadow</SPAN> plug-in can be used to =
achieve=20
  raytraced shadows with standard 3ds Max lights and V-Ray. Note that in =
most=20
  cases the standard 3ds Max <SPAN class=3Dvalue>Ray Traced=20
  Shadows</SPAN>&nbsp;will not work with V-Ray. You must use the <SPAN=20
  class=3Dvalue>VRayShadow</SPAN> shadow generator instead. In addition =
to=20
  supporting blurry (or area) shadows, they will also cast correct =
shadows from=20
  objects with V-Ray displacement, as well as from transparent=20
objects.</P></BLOCKQUOTE>
<H2><A name=3Dparameters></A>Parameters</H2>
<BLOCKQUOTE><IMG=20
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1px solid"=20
  hspace=3D10 alt=3D"[VRayShadow parameters]" vspace=3D10=20
  =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/controls/shadows.png=
">=20
  <P><SPAN class=3Dparameter>Transparent shadows</SPAN> - this option =
determines=20
  the behaviour of the shadows when there are transparent objects in the =
scene.=20
  When this option is on, V-Ray will calculate shadows regardless of the =
light's=20
  Object Shadows settings (Color, Density, Map, etc.), however the color =
of=20
  shadows from transparent objects will be correct. When this option is =
off, the=20
  shadows will take into account the Object Shadows parameters of the =
light, but=20
  shadows from transparent objects will be monochromatic (shades of gray =

  only).</P>
  <P>&nbsp;</P>
  <P><SPAN class=3Dparameter>Bias</SPAN> - optionally, V-Ray can compute =
the=20
  shadows at a point that is slightly displaced towards the light from =
the=20
  actual surface being shaded. This may be useful to prevent "surface =
acne"=20
  (black spots on the surface because of incorrect self-shadowing).</P>
  <P>&nbsp;</P>
  <P><SPAN class=3Dparameter>Area shadow</SPAN> - turns area shadows on =
and=20
  off.</P>
  <P>&nbsp;</P>
  <P><SPAN class=3Dparameter>Type</SPAN> - determines the way in which =
the area=20
  shadows are calculated:</P>
  <BLOCKQUOTE>
    <P><SPAN class=3Dvalue>Box</SPAN><I> - </I>V-Ray computes the =
shadows as if=20
    they were cast by a light source with the form of a box.<BR><BR></P>
    <P><SPAN class=3Dvalue>Sphere</SPAN><I> - </I>V-Ray computes the =
shadows as if=20
    they were cast by a light source with the form of a =
sphere.</P></BLOCKQUOTE>
  <P>&nbsp;</P>
  <P><SPAN class=3Dparameter>U size</SPAN> - the U size of the light =
source V-Ray=20
  takes into account when computing area shadows (if <SPAN=20
  class=3Dvalue>Sphere</SPAN> light source is selected U size =
corresponds to the=20
  sphere's radius).</P>
  <P>&nbsp;</P>
  <P><SPAN class=3Dparameter>V size</SPAN> - the V size of the light =
source V-Ray=20
  takes into account when computing area shadows (this parameter has no =
effect=20
  when <SPAN class=3Dvalue>Sphere</SPAN> light source is selected).</P>
  <P>&nbsp;</P>
  <P><SPAN class=3Dparameter>W size</SPAN> - the W size of the light =
source V-Ray=20
  takes into account when computing area shadows (this parameter has no =
effect=20
  when <SPAN class=3Dvalue>Sphere</SPAN> light source is selected).</P>
  <P>&nbsp;</P>
  <P><SPAN class=3Dparameter>Subdivs</SPAN> - this value controls the =
number of=20
  samples V-Ray will take to compute area shadows at a given point. More =
subdivs=20
  mean less noise, but will render slower.</P>
  <P>&nbsp;</P></BLOCKQUOTE>
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