I have a standard 'light' object being sprayed through an emitter very fast at 20,000cm ( simillar to the appearance of sparks made from welding) any pointers on how to get a slight motion blur to these? Thanks

Sorry, no the camera isn't moving. I need to use the motion tracker to generate the tracking markers (manual tracks) for the object tracker and a solver camera gets created at some point along the way. The solver camera currently isn't recognizing the camera is at a tilt. Inside of the motion tracker I'm just loading the video footage and generating the manual tracks, I'm not running the solver in there or anything. Thanks for taking the time.

Takes a look at these two video.  On these I cover both how to add lashes and how to make them animatable.   Dan

Well I'm not sure if I'm understanding your question correctly, but if you want to export exact same dimensions as modeled in c4d to your slicer,  then you need to make sure you are exporting in the same measuring units as you modeled. If you do modeling  in mm ( set in c4d preferences/unit ) then make sure you are exporting to stl in mm 1.0 (scale 1 in millimeters - meaning 1:1 ratio).   So in this case  10mm cube should show up as 10mm cube in slicer.

To me, the OpenGL representation of this Material is far more interesting than the resulting render (see JPG).

How can I get some of that interesting texture back into the render?  (R17, material preset= "Metal - Gold Antique")
 

Oh, so you have a moving camera?  I didn't realize that.  There are calibration settings within the motion tracker.  If you watch the tutorial I'm pretty sure he shows you how to use them.  Basically you pick points on the floor and assign XZ dimensions or whatever makes sense for your scene. Or, if I'm misunderstanding you again, let me know and I'll try to help.

Oh man, I totally didn't catch that! Thanks!

Dynamics doesn't care about Normal Direction, but hair collision very much does, and that is what is going wrong with this file - both spheres have inverted normals - fix that by selecting both objects and all polys and doing 'reverse normals' from the right click menu.   CBR