No, I did not see these before. It must mean they are not often referenced here…
Some have nice explanations, like the “Small corner case”, but it’s not complete and we don’t see Pascal actually creating the fillets.
I feel like the most important notions are not explained in this playlist and a lot of time is spent in tools that are more traps than really useful. My thoughts about fillets in Rhino:
-FilletEdge is used often but only on the most simple prismatic geometry.
-Tools that tries to mimic the behavior of SolidWorks (and the others) are traps. Again, they will work sometimes, but not when they would be really useful and save time. Rhino does not have the hundred of edge cases, with code to handle them, as Parasolid has.
-FilletSrf can get the job done in all situations. It also help to create better models because errors are seen immediately (for example, non-tangent surfaces produces fillets which ends do not align). When you catch such errors this soon, it’s a lot of work that is spared.
-Specific techniques like when to use or not use the “Extend” option, when to trim the base surfaces (and how to detect when you’ll need to keep a copy of a base surface handy because it will be all consumed but still needed to generate another fillet)
Edit…
What I mean is that posts like Why are fillets so bad? are coming in weekly.
McNeel can put all its ressources into adding cases to the FilletEdge algorithm but it will never compete with Parasolid.
Best is to use its strength to help user create clean simple fillets using FilletSrf. It’s a matter of knowing how and where to start and it’s not much more time. And it’s for better results (Parasolid often takes liberties and create problematic geometry that bites the user back downstream)