Hello all!

I am currently working on VIPER rover terramechanics SPH simulations using 
the the ChTireTestRig and have been struggling to generate images and 
animations that include the wheel, soil and complete rig mechanism.

I was previously using *ParaView*, but `ChTireTestRig` doesn't have a 
built-in function to save VTK files of the mechanism itself. Because of 
this, my animations only showed a floating, single wheel gliding through 
the soil. Let's just say that for the purpose of presenting results to 
people who aren't familiar with terramechanics single-wheel tests, it looks 
a bit mind-boggling! Haha.  

So, I decided to try *Blender*, since I've seen beautiful images and 
animations on SBEL's website and knew, from SBEL's NASA Workshop slides, 
that they were generated there. However, now I have the opposite problem: I 
can only export the solids, not the soil.  

Here is what I have tried so far to bridge the gap:

   - 
   
   *Exporting soil from ParaView to Blender:* I tried saving the soil as an 
   animated scene in ParaView, but it only exports in the .vtk.js extension, 
   which Blender doesn't support.
   - 
   
   *Using SciBlender:* I managed to export the soil in other formats, and 
   while it generates files for all timesteps, Blender only reads them as 
   individual static scenes.
   - 
   
   *StopMotionOBJ:* I tried using this add-on to handle the time sequence, 
   but I couldn't get it to show in the export/import menu, despite installing 
   it.
   - 
   
   *Exporting the mechanism from Blender to ParaView:* I attempted to bring 
   the rig into ParaView, but I couldn't export it as an animated scene.
   

Currently, the only workaround I have is generating static images in 
ParaView by exporting the mechanism from Blender as a .glb file at the 
exact timestep I need. Unfortunately, this means I cannot generate 
animations.
  
I apologize for the long text, but I thought it was important to share what 
hasn't worked. Could anyone provide some guidance or a recommended workflow 
on how to render animations that include the soil, the wheel, and the rig 
mechanism all together? 

Thank you very much!

--Rebeca

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