Export Metal-Roughness maps

Author: sercero

README.md

@@ -10,6 +10,7 @@
  - [Updating to new versions](#updating-to-new-versions)
  - [Video Tutorials](#video-tutorials)
  - [Exporting Meshes](#exporting-meshes)
+    - [Materials](#materials)
     - [Blender Modifiers Support](#blender-modifiers-support)
     - [Mesh triangulation issues](#mesh-triangulation-issues)
 	- [OgreNext Tips](#ogrenext-tips)
@@ -67,6 +68,15 @@ The active object selection is when there is an object with a yellow outline (in
 
 Check out all the exporter and importer options in the [Options Document](Options.md)
 
+### Materials
+Materials are exported as RTSS OGRE 1.x materials (unless "Fixed Function Parameters" is selected).
+The following textures are exported: Base Color, Metallic and Roughness, Normal Map and Emission. Baked Ambient Occlusion is not supported for the moment.
+
+Your material will be best exported if you follow the GLTF2 guidelines: [glTF 2.0 - Exported Materials](https://docs.blender.org/manual/en/2.80/addons/io_scene_gltf2.html#exported-materials).
+Except for the Emission texture, where the Emission input of the Principled BSDF node is used as the Emission texture.
+
+A good example of how the material should be setup for best results is the "Damaged Helmet" model found here: https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/DamagedHelmet
+
 ### Blender Modifiers Support
 Blender has some very useful modifiers, and most of them are supported by `blender2ogre` but not all of them.
 Check out the [Blender Modifiers Support Page](Modifiers.md) to check out the list and also some recommendations about them.

io_ogre/config.py

@@ -30,7 +30,7 @@
     'SWAP_AXIS' : 'xyz', # ogre standard is 'xz-y', but swapping is currently broken
     'MESH_TOOL_VERSION' : 'v2',
     'XML_DELETE' : True,
-    
+
     # Scene
     'SCENE' : True,
     'SELECTED_ONLY' : True,
@@ -40,19 +40,19 @@
     'FORCE_LAMPS' : True,
     'NODE_ANIMATION' : True,
     #'NODE_KEYFRAMES' : False,
-    
+
     # Materials
     'MATERIALS' : True,
     'COPY_SHADER_PROGRAMS' : True,
     'SEPARATE_MATERIALS' : True,
     'USE_FFP_PARAMETERS': False,
-    
+
     # Textures
     'MAX_TEXTURE_SIZE' : 4096,
     'FORCE_IMAGE_FORMAT' : 'NONE',
     'TOUCH_TEXTURES' : True,
     'DDS_MIPS' : 16,
-    
+
     # Armature
     'ONLY_DEFORMABLE_BONES' : False,
     'ONLY_KEYFRAMED_BONES' : False,
@@ -73,22 +73,22 @@
     'INTERFACE_TOGGLE': False,
     'OPTIMISE_VERTEX_BUFFERS' : True,
     'OPTIMISE_VERTEX_BUFFERS_OPTIONS' : 'puqs',
-    
+
     # LOD
     'LOD_LEVELS' : 0,
     'LOD_DISTANCE' : 300,
     'LOD_PERCENT' : 40,
     'LOD_MESH_TOOLS' : False,
-    
+
     # Pose Animation
     'SHAPE_ANIMATIONS' : True,
     'SHAPE_NORMALS' : True,
-    
+
     # Logging
     'ENABLE_LOGGING' : False,
     'DEBUG_LOGGING' : False,
     #'SHOW_LOG_NAME' : False,
-    
+
     # Import
     'IMPORT_NORMALS' : True,
     'MERGE_SUBMESHES' : True,