[Bf-docboard-svn] bf-manual: [7762] trunk/blender_docs/manual/modeling/geometry_nodes/attributes_reference.rst: Geometry Nodes: update attributes reference

[Jacques Lucke]

Revision: 7762
          https://developer.blender.org/rBM7762
Author:   JacquesLucke
Date:     2021-02-19 13:32:30 +0100 (Fri, 19 Feb 2021)
Log Message:
-----------
Geometry Nodes: update attributes reference

Modified Paths:
--------------
    trunk/blender_docs/manual/modeling/geometry_nodes/attributes_reference.rst

Modified: trunk/blender_docs/manual/modeling/geometry_nodes/attributes_reference.rst
===================================================================
--- trunk/blender_docs/manual/modeling/geometry_nodes/attributes_reference.rst	2021-02-19 04:44:16 UTC (rev 7761)
+++ trunk/blender_docs/manual/modeling/geometry_nodes/attributes_reference.rst	2021-02-19 12:32:30 UTC (rev 7762)
@@ -42,7 +42,11 @@
        :doc:`Point Distribute Node </modeling/geometry_nodes/point/point_distribute>`
        in the viewport.
 
+   * - **material_index**
+     - *Integer*
+     - Used to specify the material slot for every polygon in a mesh.
 
+
 Naming Conventions
 ==================
 
@@ -75,10 +79,14 @@
        the :doc:`Attribute Randomize Node </modeling/geometry_nodes/attribute/attribute_randomize>`.
 
 
-Vertex Groups
-=============
+Custom Attributes
+=================
 
-All vertex groups can be used as attributes in the node tree when referred to by name.
-However, the result of the node tree does not always produce vertex groups, if a node like
+Vertex groups, uv maps and vertex colors are available as attributes in geometry nodes.
+They are referred to by their name.
+Naming collisions (e.g. a vertex group and a uv map with the same name) should be avoided.
+If there is a naming collision, only one of the attributes is accessible in geometry nodes.
+
+Note, that geometry nodes does not always produce e.g. vertex groups if a node like
 :doc:`Join Geometry </modeling/geometry_nodes/geometry/join_geometry>` is used.
-
+That implies that other functionality in Blender that expects vertex groups, cannot access the attribute anymore.