Questions tagged [rigid-body-simulation]

Questions pertaining to Blender's built-in rigid body physics simulator and rigid body simulations in the Blender game engine. Rigid body physics are used to accurately calculate dynamic motion of non-deforming objects.

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How do I freeze a rigid body in its position?

So, I dropped a suzanne using rigid body physics, I want to freeze it in the pose it landed in and remove the rigid body physics. How would I do this?
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How do I improve the physics on this rigid body cardboard box animation?

I have a box. I want to make it behave like it is made out of thick cardboard. I have an object that I want to rise out of the box, and for the physics to look realistic. This is how it looks now: ...
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Using Rigid Body to push something out of a flapped box

I have a flapped box, and I want to lift an object out of it, forcing the flaps to open as it pushes against them. Here's my sphere failing to open the flaps: I have seen an answer here, but building ...
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  • 394
2 votes
1 answer
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make rigid body end in a certain position

Is it possible to end a rigid body sim in a specific pose? I am trying to let a burger patty fall on a bun, but it does not want to reach the place where it belongs haha
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Boolean modifier creates mesh hole that Rigid Body Sim ignores

I am trying to model a pool table where the balls would fall into holes during play. If I create the Passive table object with boolean modifiers Difference with cylinder the RB-active spheres (balls) ...
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3 votes
1 answer
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Multiple collections for Rigid Body

As written in rigid body physics docs Allows rigid body collisions allocate on different groups (maximum 20). How do I use Multiple collections for Rigid Body simulations ? I see only one collection ...
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1 answer
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Rigid Body Simulation Bake to Keyframes moving all objects to same location

I'm trying to bake my physics simulation to keyframes however when I do so all the objects clump together (as shown in photo) The objects are animated and I have found if I make a single user copy of ...
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2 votes
1 answer
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Why chain object break when colliding with another object?

I create chain object and i apply rigid body simulation in it. After that, i try the chain and the chain fall likes real chain like in this picture but when i try it in different position, the chain ...
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Cell Fracture Exploding When I Add Rigid Body

It keeps exploding and idk why, pls help. Here's the file https://we.tl/t-cjMKbH7rsG
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Motion blur is affecting non-moving parts

Without Motion Blur With Motion Blur The elements in the foreground are stationary. Link to blend: https://drive.google.com/file/d/15RwIEsUxgMJDbkD29R1llmPtU81jgVCA/view?usp=sharing
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3 votes
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animated passive rigid body not behaving correctly

Deleting bakes did not help me. Blender file: https://www.mediafire.com/file/y82wqv1mwc963gn/movingrigid.blend/file
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Incrementing bake animation with physics

I made a animation where I rotate a gameboard to move a ball: https://youtu.be/-C43MW5vzy8 The ball is active and the board a passive rigid body that's animated, rotation only. Moving the ball ahead ...
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How to export animations with glb

I have some 3d text that I've changes to meshes and attached rigid bodies to. They basically fall onto a plane and that's the animation. When I export to glb, I can see the 3d text meshes but can't ...
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Rigid body's collision stays in place

Rigid body's collision stays in place even though the rigid body is moving. Because of this, the fabric catches on the void and rigid body passes through the fabric.
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4 votes
1 answer
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Wrong collisions(bouncing) in rigid body physics with 3 objects

I want a beam being in stable position then move cylinder to another side of pit in beam so higher end of beam goes to floor then do the same but in opposite direction and repeat it multiple times. ...
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1 answer
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Can Rigid Body Dynamics Conserve energy or momentum?

I'm trying to create a rigid body simulation that is physically accurate (meaning that energy and momentum are conserved in the system). I want to drop a sphere off of a larger sphere, and I've ...
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1 vote
0 answers
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Strange centers

I have a mesh, when I set the center of the mesh to "ORIGIN_CENTER_OF_VOLUME", the center seems to be located out of the object. However, when I set "ORIGIN_CENTER_OF_MASS", the ...
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Rigid body simulation - How can I start it from the frame I want not frame 0?

I have made a sphere explode with cell fracture, a rigid body simulation, a force field placed inside it, and not gravity. I wish to simulate a debris explosion in space. My only problem is that I ...
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Rigid Body Physics break when closing and reopening the project

Since I added multiple scenes (they are full copys of one original), every time I quit Blender the physics in all scenes but my original one stop working. It behaves as if they just hadn't any physics ...
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1 answer
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Geo nodes + rigid bodies not working

I was wondering if it would be possible to use the generated geometry from geo nodes as a rigid body without actually needing to apply the modifier. I made a quick test where I have two rigid bodies, ...
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1 answer
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Cloth physics not updating the passive rigid body component

Steps I took: Added a plane mesh and changed: Subdivided 20 times Added cloth simulation and pinned the edges, changed properties: Quality Steps: 20 Collisions > Quality: 5 Added Rigid Body, ...
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2 votes
1 answer
21 views

Particle System with Object Instance doesnt work properly (I want my caveman with a leaf skirt to dance)

My caveman's skirt doesnt seem to work properly. The project: caveman dances, and his skirt should move along (not stationary). What i did: - Particle System with Object (Leaf) and Vertex Group (it ...
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0 answers
19 views

Why do simulations just break sometimes?

I thought I was doing something wrong and breaking them, but here's how it goes. I bake a rigidbody simulation. I add a bit to the scene to make it look better. I delete the bake and bake again, and ...
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2 votes
2 answers
46 views

Simulations Rigid Bodies

I have a problem with my animation. I have two objects and I have already made an animation for the first one - it's falling down and bouncing - I made it manually. Then I want another object to fall ...
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1 vote
1 answer
64 views

How to follow a rotating path?

I am trying to create a mechanical cam and cam follower assembly. A closed loop path is parented to a rotating disk. One end of a cam follower arm pivots at a static hinge location. The other end ...
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1 vote
2 answers
40 views

Alternative ways to add rotation to an object?

I baked a rigid body simulation of a ball falling down the stairs. The ball's trajectory is ok, but I want to add additional rotation to the ball. The simulation is baked to keyframes. It would be ...
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1 vote
0 answers
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Apply force/impulse to objects

I am trying to apply a force to certain objects via a self-made script. Though I cannot find any option to do so in Blender. I could only find something equivalent in Blenders Game Engine: ...
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2 answers
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Multi Rigid Body hinge joints not keeping alignment

Set up: In the Front Leg Demo file, I'm using rigid body Passive element as the horse body (not moving), Active rigid bodies for the three leg parts and Hinge constraints for the joints that connect ...
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2 votes
1 answer
52 views

How do I simulate multiple connected pivot joints in a mechanism?

Hi i am doing a dynamic simulation for a project and i want to simulate movement of multiple connected pivot joints. This will be explained further in the following images: This is the mechanism in ...
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1 vote
0 answers
34 views

why is my rigid body (buildings) moving so randomly? [closed]

As you can see from the gif, the buildings when they break, instead of crumbling they seem to flail around. Does anyone know how to fix this?
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4 votes
2 answers
182 views

How do you reverse physics simulations? [duplicate]

I have a bunch of rigid-body objects that get moved by a force field. I want to reverse the physics simulation so that it plays backwards while other animations, like the camera movement and animated ...
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1 vote
1 answer
31 views

Rigid body simulation explodes instead of collapsing

I want a part of a dinosaur to collapse so that the bones fall to the ground and bounce a few times. I have enabled a rigid body simulation for each bone. The problem is that the bones seem to bounce ...
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blender wont render using the correct enigne

So, I'm a complete newbie at blender started just a few days ago and I can't for the life of me figure this out. I will set the render engine to cycles but whenever I hit f12 it just renders with ...
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2 votes
1 answer
35 views

Is there a way to apply the animation of the rigid body to mesh?

I wanted to apply the result of the animation to my mesh, so that I get a fractured flower pot. Is there a way to do that?
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0 answers
18 views

Different Simulation results

I have two similar objects, however, one of them behaves normally during the simulation process, while the other one doesn't, I can not figure out what results in this difference.
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2 votes
0 answers
26 views

Rigid body flying into air rather than dropping down

Whenever I add rigid body to a fragment of a Pawn chess piece that has been Cell Fractured, the piece doesn't drop straight down but instead flies around. However when I copy the Pawn piece into a ...
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1 vote
1 answer
41 views

Only render&simulate some of the objects in python

I have a question: Now I have a giant amount of objects as well as the materials, however, I only want to select some of them to participate in the simulation&rendering every time(which means the ...
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1 vote
1 answer
43 views

rigid body animation start at keyframe

i have tried everything possible, but either the Physik animation doesn't start at all, or it happens spontaneously from the start frame to the end frame. i tried with to play with gravity and Rigid ...
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1 vote
1 answer
32 views

Shooting with Three Trebuchets

What is the correct way to organize the animation of this scene? Three similar trebuchets (A, B and C) are available. The trebuchet file is attached in the question "Trebuchet Rigid Body". ...
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1 vote
1 answer
24 views

Dynamic and Keyframes

I have two standard cubes (A and B). I have a specific animation plan. Cube A has a linear movement along the X axis. The animation starts at frame #1, the animation ends at frame #30. Cube B has a ...
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1 answer
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How to pin a working trebuchet sling using cloth, soft body, and rigid body objects together

I have a working trebuchet arm and counterweight. There are short lengths of chain on the end of the arm; one is fixed to the arm by a ring and the other is hanging on a pin stuck in the end of the ...
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2 votes
0 answers
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Rigging up a machine with moving objects and constraints? Would rigid body sim work for this? [duplicate]

I am trying to reproduce this in blender. I have the 3D models for the all the parts. I even tried using rigid body sims to try to achieve the desired end goal with some partial success. The animation ...
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0 votes
1 answer
21 views

Duplicate Collection doesn't add to RigidBodyWorld Collection

If I apply Rigid Body physics to objects in a collection, and then duplicate the collection: The objects in that collection have the RB operator, but are not added to the RB World, even if I then ...
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Rigid Body World

I created a group of standard objects (cube, sphere and cone). I applied a Rigid Body modifier to each of the objects with standard settings. Next, I created a separate file and using the Copy-Paste ...
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4 votes
1 answer
44 views

Marble Run - Rigidbody jumping around

I tried to create a simple marble run using tracks build from bezier curves. But something doesen't seem to work correctly, my marble always jumps around as it hit's the tracks. https://drive.google....
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0 answers
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Rigid Body Coin Keeps rolling after landing on Plane

I have a coin flipping with rigid body applied to both coin and plane. The coin lands fine but keeps rotating endlessly and does not look very real. I have tried the Deactivate setting with no success....
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2 votes
1 answer
41 views

Combination of liquid simulation and rigid simulation

Please forgive poor English by translation Version used: 3.1.0 Alpha When liquid collision and rigid body are used together the fluid accelerates to an unusual degree. Is there any way to calculate ...
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15 views

Blender Hair Particle Collision

I have a character walking animation. I used sphere as Hair particles on the character body. I want these sphere to collide each other like rigid body linking. I tried hair dynamics and it does ...
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0 votes
1 answer
36 views

Why is flat object not working in rigid body?

Hello my dear blender artists, why flat object don't work in rigid body? i simulated two type objects : box and scaled box (Z axis scale that makes it flat). but only box that hit the floor. the flat ...
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1 vote
0 answers
19 views

Rigid Body Simulation: How to roll the dice to six? [duplicate]

this is a generel question for me as a beginner. How is it posible for a rigid body (like a dice) to land in a specific view, like the six on the top? I was planing a small project with some cubes. ...
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