A Blender add-on for importing a sequence of OBJ meshes as frames
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neverhood311 Multiple materials (#12)
* Added support for per-frame material

* Fixed Bake Sequence for single-material sequences

* Start frame, playback speed, frame mode only show after sequence loaded

* Updated README

Closes #10
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README.md Multiple materials (#12) Mar 16, 2018
mesh_sequence_controller.py Multiple materials (#12) Mar 16, 2018

README.md

Stop-motion-OBJ

A Blender add-on for importing a sequence of meshes as frames

Stop motion OBJ allows you to import a sequence of OBJ (or STL or PLY) files and render them as individual frames. Have a RealFlow animation but want to render it in Blender? This addon is for you! Currently tested for Blender 2.79.1.

If you find this add-on helpful, please consider donating to support development:

Bitcoin wallet: 16Bbv5jmKJ2T3dqw2rbaiL6vsoZvyNvaU1

PayPal: https://www.paypal.me/justinj

IMPORTANT

  • File numbers must be zero-padded
    • Like this: file001, file002, file003
    • NOT like this: file1, file2, file3
  • You MUST restart Blender after enabling the add-on

Features

  • Supported formats: OBJ, STL, PLY
  • Allows changing topology
    • (the meshes don't need to have the same number of vertices and faces)
  • Supports shapes with UVs and image textures
  • Variable playback speed
  • Multiple playback modes
  • Object can have different materials on each frame
    • For instance, you can have a different MTL file for each OBJ file
  • Bake sequence
    • This allows the sequence to be viewed on other computers without installing the addon (in a renderfarm, for example)

Limitations

  • Only absolute filepaths are supported (for now)
  • File numbers must be zero-padded
  • No motion blur
  • Doesn't work with physics
    • (It actually works with rigid body physics. In Rigid Body Collisions set Shape to 'Mesh' and Source to 'Base')
  • Only single-object files are supported
  • Sequences can't be duplicated (for now)
    • Sequences can now be duplicated, but they share a material. For a duplicate sequence with a different material, you have to re-import the sequence.

Installing Stop motion OBJ

  • Download mesh_sequence_controller.py and move it to Blender's addons folder (something like C:\Program Files\Blender Foundation\Blender\2.79\scripts\addons)
  • Open Blender and open the Add-ons preferences (File > User Preferences... > Add-ons)
  • In the search bar, type 'OBJ' and look for the Stop motion OBJ addon in the list
  • Check the box to install it, and click 'Save User Settings'
  • RESTART BLENDER BEFORE USING THE ADDON

Using Stop motion OBJ

  • (make sure you've installed the addon and restarted Blender before using)
  • In the 3D view, click Add > Mesh > Mesh Sequence
    • The object will initially be empty. We need to load a mesh sequence into it.
  • Make sure the object is selected.
  • In the properties panel, click on the Object Properties tab (the little orange cube icon). In the settings panel, scroll down to find the Mesh Sequence subpanel and open it.
  • Enter the Root Folder by clicking on the folder button and navigating to the folder where the mesh files are stored. Make sure to UNCHECK ‘Relative Path’
  • In the File Name box, enter a common prefix of the files.
    • ex: If you have frame001, frame002, frame003, you could enter ‘frame’, 'fram', or even 'f'
  • If your sequence has a different material for each frame, check the "Material per Frame" checkbox. Otherwise, leave it unchecked.
  • Click ‘Load Mesh Sequence’ to load.
    • Depending on the number of frames, this could take a while.
  • Step through a few frames to see the animation.
  • You can adjust which frame the animation starts on as well as its playback speed.
  • You can also decide what happens before and after the mesh sequence:
    • 'Blank' will simply make the object disappear after the end of the sequence
    • 'Extend' will freeze the first and last frames before and after the mesh sequence, respectively
    • 'Repeat' will repeat the animation
    • 'Bounce' will play the animation in reverse once the sequence has finished
  • Once your sequence is loaded, you can change the shading (smooth or flat) of the entire sequence:
    • The shading buttons are found in the Mesh Sequence Settings for the object
    • Note: The normal shading buttons (in the 3D View "Tools" panel) will only affect the current frame, not the entire sequence