Add footnote about colors being in-gamut (i.e. components in [0,1])

README.md

@@ -1,7 +1,14 @@
-# OpenPBR Surface
 
+
+<br>
+<p align="center">
+<img src="images/logo/openpbr-logo-glyph.svg" alt="homepage" height="80px" style="vertical-align: middle; position: relative; bottom: 3px"/>&nbsp;&nbsp;
+<img src="images/logo/openpbr-logo-text.svg"  alt="homepage" height="96px" style="vertical-align: middle; position: relative; bottom: 3px"/>
+</p>
+<br>
 <p align="center">
-<img src="images/OpenPBR_title.jpg" title="OpenPBR demonstration scene" />
+<img src="images/OpenPBR_title.jpg" title="OpenPBR demonstration scene" width="80%"/>
+<br>
 <sub><i>Shader Playground, rendered in Arnold for Maya, using OpenPBR Surface. Artwork by Nikie Monteleone.</i></sub>
 </p>
 <br>

examples/open_pbr_lightbulb.mtlx

@@ -4,6 +4,7 @@
     <input name="surfaceshader" type="surfaceshader" nodename="open_pbr_surface_surfaceshader" />
   </surfacematerial>
   <open_pbr_surface name="open_pbr_surface_surfaceshader" type="surfaceshader">
+    <input name="emission_weight" type="float" value="1.0" />
     <input name="emission_color" type="color3" value="1.000, 0.415, 0.099" />
     <input name="emission_luminance" type="float" value="10000" />
   </open_pbr_surface>