In one of the last posts I made, I added around 200 balls with rigid body modifiers to it. Now, no balls are falling. I have tried manually baking and clearing multiple times, and it is still not working.
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- $\begingroup$ if the answer to your previous question was correct, please mark it as such ;) $\endgroup$moonboots– moonboots2025-10-21 16:04:58 +00:00Commented Oct 21 at 16:04
- $\begingroup$ Hello and welcome. While files, images, and external videos or links may be helpful additions they should not be the only way to obtain information about your issue. Don't make understanding your question rely on downloading a file, watching a video or visiting an external site. Use the builtin tools to upload images or GIFs, along with thoroughly explaining the problem in written form so it can be indexed and searched for thus helping future visitors with similar issues. $\endgroup$Duarte Farrajota Ramos– Duarte Farrajota Ramos ♦2025-10-21 16:43:35 +00:00Commented Oct 21 at 16:43
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6 For some reason, your objects were not linked into the (invisible) Collection "RigidBodyWorld". You can see this collection on the Scene Properties panel:
But if I look at the Blender File view in the outliner, I only see your Cylinder in this list:
So I selected all of the objects and (again) added them as Active RBs:
which will re-link them into RigidBodyWorld collectipon, and they are now participants. 
What caused this? My guess: you went to Scene properties, "Removed" RB World and re-added it. But that didn't relink all the objects into that Collection.
- 2$\begingroup$ @benni-ben: just to add a small detail: your jar has convex hull as shape, should be mesh so that Blender recognizes the hole. $\endgroup$Chris– Chris2025-10-21 16:46:10 +00:00Commented Oct 21 at 16:46
- 1$\begingroup$ I had used an addon to add them so that might be why... $\endgroup$benni-ben– benni-ben2025-10-21 17:37:40 +00:00Commented Oct 21 at 17:37
- 1$\begingroup$ @Chris Interesting, the file in the last question where the ball won't fall into the jar had the shape correctly set to Mesh. Maybe he changed it, this would explain why he won't accept my answer because for him it is still not falling into the jar... $\endgroup$Gordon Brinkmann– Gordon Brinkmann2025-10-22 06:00:53 +00:00Commented Oct 22 at 6:00
- 1$\begingroup$ @james_t By the way, for single RB objects you could add them to the "RigidBodyWorld" collection in the Object Properties, but that's a bit tedious for several objects. Another option would be to have a collection where all RB objects are in and simply choose this under Scene Properties > Rigid Body World > Settings > Collection, it doesn't have to be called "RigidBodyWorld"... since objects can be linked to multiple collections, you can use this one to clearly see them in the Outliner. Of course this could be done by linking the original "RigidBodyWorld" collection to the scene. $\endgroup$Gordon Brinkmann– Gordon Brinkmann2025-10-22 06:20:36 +00:00Commented Oct 22 at 6:20
- 1$\begingroup$ @GordonBrinkmann -- thanks. And another way would be to add one object to the RBW collection, and then select all others and RWB object, and "Object >> Link/Transfer >> Link_Collections". I heart extremely arcane applications that require me to breath through a narrow glass straw, LOL. $\endgroup$james_t– james_t2025-10-23 19:20:09 +00:00Commented Oct 23 at 19:20