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Subject: VRayLight Material examples
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      <H1>VRayLightMtl examples</H1></TD>
    <TD width=3D0%>
      <DIV align=3Dcenter><A=20
      =
href=3D"http://www.spot3d.com/vray/help/150SP1/index.htm">Home</A></DIV><=
/TD>
    <TD width=3D0%>
      <DIV align=3Dcenter><A=20
      =
href=3D"http://www.spot3d.com/vray/help/150SP1/render_params.htm">Render&=
nbsp;params</A></DIV></TD>
    <TD width=3D0%>
      <DIV align=3Dcenter><A=20
      =
href=3D"http://www.spot3d.com/vray/help/150SP1/vray_light_mtl.htm">VRayLi=
ghtMtl</A></DIV></TD></TR></TBODY></TABLE>
<P>&nbsp;</P>
<BLOCKQUOTE>
  <P><A=20
  =
href=3D"http://www.spot3d.com/vray/help/150SP1/examples_vraylightmtl.htm#=
ex1">Example=20
  1: Default Color and Multiplier values</A></P>
  <P><A=20
  =
href=3D"http://www.spot3d.com/vray/help/150SP1/examples_vraylightmtl.htm#=
ex2">Example=20
  2: Higher Multipliers / 2-sided <SPAN class=3Dvalue>On</SPAN> and =
<SPAN=20
  class=3Dvalue>Off</SPAN></A></P>
  <P><A=20
  =
href=3D"http://www.spot3d.com/vray/help/150SP1/examples_vraylightmtl.htm#=
ex3">Example=20
  3: Texmap</A></P></BLOCKQUOTE>
<H2><A name=3Dex1></A>Example 1: Default Color and Multiplier =
values</H2>
<BLOCKQUOTE>
  <P>Here is a scene rendered with the default VRayLightMtl. These =
examples=20
  demonstrate how the material behaves in V-Ray, and how its parameters=20
  influence the overlook of the final results.</P>
  <P>&nbsp;</P>
  <TABLE border=3D0 cellSpacing=3D2 cellPadding=3D4 width=3D0%>
    <TBODY>
    <TR vAlign=3Dtop>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_01_perspective_grab.png"><IMG=20
        border=3D1 align=3Dtop=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_01_perspective_grabS.png"=20
        width=3D200 height=3D156></A></P>
        <P>The white plane is a default VRayLightMtl. The teapot is a =
default=20
        VRayMtl with Reflection. Rest is just VRayMtl with diffuse=20
colors.</P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_01_noGI.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_01_noGI_S.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Default Lights</SPAN> - <SPAN=20
        class=3Dvalue>Off</SPAN>.</P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>1.0</SPAN></P>
        <P>No <SPAN class=3Dparameter>GI</SPAN>, No lights</P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_01_noGI_m50.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_01_noGI_m50_S.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>50.0</SPAN></P>
        <P>No <SPAN class=3Dparameter>GI</SPAN>, No lights</P>
        <P>&nbsp;</P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_02_GI_m1.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_02_GI_m1_S.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>1.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P>&nbsp;</P></TD></TR>
    <TR vAlign=3Dtop>
      <TD width=3D200>
        <P>____________________</P>
        <P>We are going to render this scene with <SPAN =
class=3Dparameter>Default=20
        Lights</SPAN> - <SPAN class=3Dvalue>Off </SPAN>till the end<SPAN =

        class=3Dvalue> </SPAN>of the example and no lights will be used =
in it as=20
        well.</P>
        <P>&nbsp;</P></TD>
      <TD width=3D200>
        <P>____________________</P>
        <P>As you see the image is absolutely dark except</P>
        <P>the plane</P>
        <P>(self-illuminated) and</P>
        <P>the reflection on the teapot. Notice we have no GI and no =
lights at=20
        all here, so the dark part of the scene is totaly expected and=20
        reasonable.</P></TD>
      <TD width=3D200>
        <P>____________________</P>
        <P>Notice that nothing changed in general, BUT the reflection on =
the=20
        teapot got stronger due to higher multiplier. Rest is still =
black:=20
        because we still have the <SPAN class=3Dparameter>GI</SPAN> =
<SPAN=20
        class=3Dvalue>off</SPAN>.</P></TD>
      <TD width=3D200>
        <P>____________________</P>
        <P>As You see turning <SPAN class=3Dparameter>GI</SPAN> <SPAN=20
        class=3Dvalue>on</SPAN> almost didn't change the overlook. That =
is because=20
        of the <SPAN class=3Dparameter>Multiplier</SPAN> value: 1.0. =
</P>
        <P>It acts mainly as just self-illuminating the object that has =
the=20
        VRayLightMtl.</P></TD></TR></TBODY></TABLE>
  <P>&nbsp;</P></BLOCKQUOTE>
<H2><A name=3Dex2></A>Example 2: Higher Multipliers / 2-sided <SPAN=20
class=3Dvalue>On</SPAN> and <SPAN class=3Dvalue>Off</SPAN></H2>
<BLOCKQUOTE>
  <TABLE border=3D0 cellSpacing=3D2 cellPadding=3D4 width=3D0%>
    <TBODY>
    <TR vAlign=3Dtop>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_02_GI_m5.png"><IMG=20
        border=3D1 align=3Dtop=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_02_GI_m5_S.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>5.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>2-sided</SPAN> <SPAN=20
      class=3Dvalue>off</SPAN></P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_02_GI_m5_2s.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_02_GI_m5_2sS.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>5.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>2-sided</SPAN> <SPAN=20
      class=3Dvalue>on</SPAN></P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_02_GI_m10.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_02_GI_m10_S.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>10.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>2-sided</SPAN> <SPAN=20
      class=3Dvalue>off</SPAN></P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_02_GI_m10_2s.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_02_GI_m10_2sS.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>10.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>2-sided</SPAN> <SPAN=20
      class=3Dvalue>on</SPAN></P></TD></TR>
    <TR vAlign=3Dtop>
      <TD width=3D200>
        <P>____________________</P>
        <P>Now You can notice that increasing the <SPAN=20
        class=3Dparameter>Multiplier</SPAN> has influenced visibly the =
scene=20
        (shadows also appears).</P></TD>
      <TD width=3D200>
        <P>____________________</P>
        <P>Scene starting to gather more light because of the <SPAN=20
        class=3Dparameter>2-sided</SPAN> - <SPAN =
class=3Dvalue>on</SPAN>.</P></TD>
      <TD width=3D200>
        <P>____________________</P>
        <P>As You see the back is still dark, but You can already notice =
the=20
        blue wall receiving some <SPAN class=3Dparameter>GI</SPAN>, due =
to higher=20
        <SPAN class=3Dparameter>Multiplier</SPAN>. Shadow also appears =
more=20
        defined.</P></TD>
      <TD width=3D200>
        <P>____________________</P>
        <P>Scene starting to gather more light because of the <SPAN=20
        class=3Dparameter>2-sided</SPAN> - <SPAN =
class=3Dvalue>on</SPAN>. But we=20
        also start to get some burnt areas due to <SPAN=20
        class=3Dvalue>Linear</SPAN><SPAN class=3Dparameter> =
</SPAN>type<SPAN=20
        class=3Dparameter> </SPAN>of<SPAN class=3Dparameter> Color=20
        mapping.</SPAN></P></TD></TR>
    <TR vAlign=3Dtop>
      <TD width=3D200>&nbsp;</TD>
      <TD width=3D200>&nbsp;</TD>
      <TD width=3D200>&nbsp;</TD>
      <TD width=3D200>&nbsp;</TD></TR></TBODY></TABLE>
  <TABLE border=3D0 cellSpacing=3D2 cellPadding=3D4 width=3D0% =
bgColor=3D#ffffff>
    <TBODY>
    <TR vAlign=3Dtop>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_02_GI_m30_expo.png"><IMG=20
        border=3D1 align=3Dtop=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_02_GI_m30_expoS.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>30.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN class=3Dvalue>on -=20
        default</SPAN></P>
        <P><SPAN class=3Dparameter>2-sided</SPAN> <SPAN =
class=3Dvalue>off</SPAN></P>
        <P><SPAN class=3Dparameter>Exponential </SPAN></P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_02_GI_m30_2s_expo.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_02_GI_m30_2s_expoS.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>30.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN class=3Dvalue>on -=20
        default</SPAN></P>
        <P><SPAN class=3Dparameter>2-sided</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>Exponential </SPAN></P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_02_GI_m30_expo_highGI.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_02_GI_m30_expo_highGI_S.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>30.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN class=3Dvalue>on ; =
</SPAN><SPAN=20
        class=3Dparameter>2-sided</SPAN> <SPAN =
class=3Dvalue>off</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: HSphS: <SPAN=20
        class=3Dvalue>100</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: Interp.S: <SPAN=20
        class=3Dvalue>40</SPAN></P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_02_GI_m30_expo_2s_highGI.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_02_GI_m30_expo_2s_highGI_S.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>30.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN class=3Dvalue>on ; =
</SPAN><SPAN=20
        class=3Dparameter>2-sided</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: HSphS: <SPAN=20
        class=3Dvalue>100</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: Interp.S: <SPAN=20
        class=3Dvalue>40</SPAN></P></TD></TR>
    <TR vAlign=3Dtop>
      <TD width=3D200>
        <P>____________________</P>
        <P>So, increasing the <SPAN class=3Dparameter>Multiplier</SPAN> =
affects=20
        the GI more (we have more light). But You can also notice that =
our=20
        render is quite splotchy. </P></TD>
      <TD width=3D200>
        <P>____________________</P>
        <P>Scene starting to gather more light because of the <SPAN=20
        class=3Dparameter>2-sided</SPAN> - <SPAN =
class=3Dvalue>on</SPAN>. Still=20
        splotchy <SPAN class=3Dparameter>GI</SPAN> solution.</P></TD>
      <TD width=3D200>
        <P>____________________</P>
        <P>Comparing this result to the previous is much better. <SPAN=20
        class=3Dparameter>GI</SPAN> solution is clearer and shadows are =
more=20
        precise. Of course this leads to higher render time.</P></TD>
      <TD width=3D200>
        <P>____________________</P>
        <P>Comparing this result to the previous is much better. <SPAN=20
        class=3Dparameter>GI</SPAN> solution is clearer and shadows are =
more=20
        precise. Of course this leads to higher render=20
  time.</P></TD></TR></TBODY></TABLE>
  <P>&nbsp;</P></BLOCKQUOTE>
<H2><A name=3Dex3></A>Example 3: Texmap</H2>
<BLOCKQUOTE>
  <P>This example shows using the <SPAN class=3Dparameter>Texmap</SPAN> =
slot and=20
  how the map determines the <SPAN class=3Dparameter>Color</SPAN> =
parameter.</P>
  <P>&nbsp;</P>
  <TABLE border=3D0 cellSpacing=3D2 cellPadding=3D4 width=3D0% =
bgColor=3D#ffffff>
    <TBODY>
    <TR vAlign=3Dtop>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_03_GI_m3_map.png"><IMG=20
        border=3D1 align=3Dtop=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_03_GI_m3_mapS.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>3.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN class=3Dvalue>on ; =
</SPAN><SPAN=20
        class=3Dparameter>2-sided</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: HSphS: <SPAN=20
        class=3Dvalue>100</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: Interp.S: <SPAN=20
        class=3Dvalue>40</SPAN></P>
        <P><SPAN class=3Dparameter>Exponential </SPAN></P>
        <P>____________________</P>
        <P>Using a <SPAN class=3Dparameter>Bitmap</SPAN> in the Texmap =
Slot. <SPAN=20
        class=3Dparameter>Multiplier</SPAN> is quite low, so almost the =
plane and=20
        the reflection on the teapot are visiable. </P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_03_GI_m30_map.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_03_GI_m30_mapS.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>30.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN class=3Dvalue>on ; =
</SPAN><SPAN=20
        class=3Dparameter>2-sided</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: HSphS: <SPAN=20
        class=3Dvalue>100</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: Interp.S: <SPAN=20
        class=3Dvalue>40</SPAN></P>
        <P><SPAN class=3Dparameter>Exponential </SPAN></P>
        <P>____________________</P>
        <P>Increasing the <SPAN class=3Dparameter>Multiplier</SPAN> =
leads to much=20
        lighter overlook of the scene. Notice now the Bitmap is getting =
closer=20
        to white color look, due to multiplying the (R,G,B) values of =
the=20
        Bitmap. </P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_03_GI_m3_map2.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_03_GI_m3_map2_S.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>3.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN class=3Dvalue>on ; =
</SPAN><SPAN=20
        class=3Dparameter>2-sided</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: HSphS: <SPAN=20
        class=3Dvalue>100</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: Interp.S: <SPAN=20
        class=3Dvalue>40</SPAN></P>
        <P><SPAN class=3Dparameter>Exponential </SPAN></P>
        <P>____________________</P>
        <P>Here is another <SPAN class=3Dparameter>Bitmap</SPAN> =
assigned to the=20
        <SPAN class=3Dparameter>Texmap</SPAN> Slot. </P>
        <P>Notice that we haven't changed the VRayMtls for the =
surrounding=20
        walls, but the scene looks different from the previous one due =
to the=20
        new Bitmap.</P></TD>
      <TD width=3D200>
        <P align=3Dleft><A=20
        =
href=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightm=
tl/ex_render_03_GI_m30_map2.png"><IMG=20
        border=3D1=20
        =
src=3D"http://www.spot3d.com/vray/help/150SP1/images/examples/vraylightmt=
l/ex_render_03_GI_m30_map2_S.png"=20
        width=3D200 height=3D200></A></P>
        <P><SPAN class=3Dparameter>Multiplier</SPAN>: <SPAN=20
        class=3Dvalue>30.0</SPAN></P>
        <P><SPAN class=3Dparameter>GI</SPAN> <SPAN class=3Dvalue>on ; =
</SPAN><SPAN=20
        class=3Dparameter>2-sided</SPAN> <SPAN =
class=3Dvalue>on</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: HSphS: <SPAN=20
        class=3Dvalue>100</SPAN></P>
        <P><SPAN class=3Dparameter>IR</SPAN>: Interp.S: <SPAN=20
        class=3Dvalue>40</SPAN></P>
        <P><SPAN class=3Dparameter>Exponential </SPAN></P>
        <P>____________________</P>
        <P>Increasing the <SPAN class=3Dparameter>Multiplier</SPAN> =
leads to much=20
        lighter overlook of the scene. Notice now the Bitmap is getting =
closer=20
        to white color look, due to multiplying the (R,G,B) values of =
the=20
        Bitmap. </P></TD></TR></TBODY></TABLE>
  <P>&nbsp;</P></BLOCKQUOTE>
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