Document mesh map node and add short/long desc.

addons/material_maker/engine/nodes/gen_meshmap.gd

@@ -95,6 +95,13 @@ func get_type() -> String:
 func get_type_name() -> String:
 	return "Mesh Map"
 
+func get_description() -> String:
+	var desc_list : PackedStringArray = PackedStringArray()
+	desc_list.push_back(TranslationServer.translate("Mesh Map"))
+	var longdesc = "Generates mesh maps for the current custom mesh"
+	desc_list.push_back(TranslationServer.translate(longdesc))
+	return "\n".join(desc_list)
+
 func get_parameter_defs() -> Array:
 	return [
 		{ name="map", type="enum", values=MESH_MAPS, label="Map", default=0 },

material_maker/doc/node_miscellaneous_mesh_map.rst

@@ -0,0 +1,25 @@
+Mesh Map node
+~~~~~~~~~~~~~
+
+**Mesh Map** node bakes maps for the current custom mesh and recalculates
+automatically when a new mesh is selected in the 3D preview.
+
+.. image:: images/node_miscellaneous_mesh_map.png
+	:align: center
+
+Inputs
+++++++
+
+The **Mesh Map** node does not accept any input.
+
+Outputs
++++++++
+
+The **Mesh Map** node outputs the selected generated map, which can be the following:
+
+* Position, Normal, Tangent, Minimum/Maximum Curvature, Cavity, Pointiness, Ambient Occulusion, Bent Normals, Thickness, Adjacency
+
+Example Images
+++++++++++++++
+.. image:: images/screenshot_mesh_map.jpg
+	:align: center

material_maker/doc/nodes_miscellaneous.rst

@@ -15,3 +15,4 @@ Miscellaneous nodes
 	node_miscellaneous_debug
 	node_miscellaneous_variations
 	node_miscellaneous_randomize
+	node_miscellaneous_mesh_map