
Unwrap3D Import/Export Plugins for Cinema4D 10/10.5/11/11.5/12 to 21 (32/64 bit)
================================================================================


INSTALLATION
============
1. Copy and paste the entire u3d_filter directory to Cinema4D's plugins directory, usually
   C:\Program Files\MAXON\Cinema 4D R20\plugins\

   The full path of the plugins should be:
   C:\Program Files\MAXON\Cinema 4D R20\plugins\u3d_filter\u3d_filter.xdl64	-> 64-bit


REQUIREMENTS
============
You may need to install the MSVC++ 2008 SP1 runtime redistributables:
https://www.microsoft.com/downloads/details.aspx?familyid=2051A0C1-C9B5-4B0A-A8F5-770A549FD78C&displaylang=en
- For 32-bit, select vcredist_x86.exe
- For 64-bit, select vcredist_x64.exe

For C4D R14, you may need to install the MSVC++ 2010 SP1 runtime redistributables:
https://www.microsoft.com/en-us/download/details.aspx?id=8328            (32-bit)
https://www.microsoft.com/en-us/download/details.aspx?id=13523           (64-bit)

For C4D R15/R16, you may need to install the MSVC++ 2012 runtime redistributables:
https://www.microsoft.com/en-us/download/details.aspx?id=30679           (64-bit)

For C4D R17/R18, you may need to install the MSVC++ 2013 runtime redistributables:
https://www.microsoft.com/en-us/download/details.aspx?id=40784		 (64-bit)

For C4D R19/R20, you may need to install the MSVC++ 2015 runtime redistributables:
https://www.microsoft.com/en-us/download/details.aspx?id=48145		 (64-bit)

For C4D R21, you may need to install the MSVC++ 2017 runtime redistributables:
https://go.microsoft.com/fwlink/?LinkId=746572		 		 (64-bit)


C4D PREFERENCES
===============
In Cinema4D, you can find the Unwrap3D plugin preferences under Edit->Preferences->Import/Export.
If you're using this plugin for the first time, make sure that these options are checked.

For C4D 10/10.5, make sure the "Optimize meshes" option is unchecked, as C4D 10/10.5 doesn't
handle vertex weights very well.


IMPORTING
=========
Lights, geometry, materials, textures, UV coordinates, multiple UVsets,
vertex weights, bones and skeletal-joint animation can be imported.

Note that all texture files should be located in the same directory as the 
model file, otherwise they may not be found.

Material properties imported:
diffuse color, diffuse texture map -> color
opacity texture map                -> alpha
bump texture map                   -> bump
normal texture map                 -> normal
specular texture map               -> specular color

Mesh properties imported:
Vertex positions
Texture coordinates (max uvsets: 2)
Polygons (triangles or quads)


Import Options
--------------
Optimize meshes:
Let Cinema4D optimize your meshes.  Points and polygons are optimized.


EXPORTING
=========
Lights, geometry, materials, textures, UV coordinates, multiple UVsets,
vertex weights, bones and skeletal-joint animation can be exported.

For geometry, only polygons are supported.  All other types, such as
Nurbs, splines, primitives, etc... are not supported.  They must be converted
to polygons before exporting them.

For animation, only joints are supported.  All other types of animation,
such as morphing or vertex-based animation, are not supported.

Not Supported
-------------
Nurbs
Splines
Primitives
Subdivision surfaces
IK Animation
Symmetry Objects


Export Options
--------------
Export as U3D v2.x:
If checked, export the scene to Unwrap3D v2.x format.  Otherwise, the scene will be
exported to Unwrap3D v3.x format.


IK Animation
============
If this model is exported with IK joint information, it may not animate properly.
IK animation must be baked to keyframes before exporting from Cinema4D.

In Cinema4D, see "Window->Timeline->Functions->Bake Objects..."


TROUBLE-SHOOTING
================
Q: The Unwrap3D plugin doesn't show up or load in Cinema4D.
A1: This plugin is dependent on the MSVC++ 2008 runtime DLLs.  See above for plugin requirements.
A2: Make sure that you copy and paste the entire u3d_filter directory into Cinema4D's 
    plugins directory.

Q: After importing into Unwrap3D, animation does not play properly.
A: In Cinema4D, make sure all IK animation has been baked to keyframes before exporting.

Q: After importing into Unwrap3D, some polygons appear to be missing.
A: This plugin uses the Melange SDK.  It can only read stored polygon data, and not data that needs to be generated.
   To fix, in Cinema4D, checkmark the option Preferences -> Files -> "Save Polygons for Melange",
   and resave the C4D file.


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