alembic particles rendering different if "use alembic procedural" is on or off
When rendering points/particles, the result with the procedural off is incorrect, no proper shading. With use alembic procedural ticked, the particles render as you'd expect.
So something is up with how you are treating regular alembic Vs running the procedural. H19.0.455 & 3dl 2.7.8 win10