Questions tagged [physics]

Questions pertaining to Blender's internal physics or the Game Engine physics.

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12 views

Cloth Simulation and Object Collision

I’m relatively new to Blender, probably been fiddling around with it for a couple of months now, working things out as I go and reading/watching tutorials for what I need. Anyway, this little project ...
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24 views

Cycles X cloth-simulation not supported yet? Cloth is red [closed]

I'm currently testing around with Cycles X and have now found that the cloak of a figure that is blowing a little in the wind is just red when I render it with Blender 3.0 Cycles X. There are no ...
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20 views

Rigid Bodies instantly jump around upon starting the animation

I have a fractured object (pic 1) and on all of the fractures, I have a rigid body animation (settings in pic 2). The problem I'm facing is: as soon as I start the animation, all the fractures with ...
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14 views

Rigidbody meshes eject each other

I’m trying to make rose petals falling from a flower by using rigidbody simulation. The problem is that cause of the proximity of the petals, the rigidbody simulation make them explode instead of ...
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30 views

How can I fix this floating gap with the softbody collision?

I know this may seem like a minor complaint, but it annoys me that the collision thickness for this plane is minimum to 0.001 which leaves this very small floating space between the softbody-ball and ...
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32 views

How to simulate a controlled, steady flow of water, and then disrupt it with object collisions to get some "gentle" turbulence?

I essentially want to recreate the same thing this program does, but in blender: https://github.com/blackoffee/Shizuku It doesn't need to be physically accurate, realtime or even 3D (shader editor ...
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32 views

Why the duplicated cloth object does not fall?

I duplicated the two cloth objects from the cloth object that I've already adjust the physics and played it back in the timeline. When I do this, the original object falls, but the two duplicated ...
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1answer
71 views

How to make delicious homemade ice cream [closed]

I am working on a project for a client in which I need to make a short gif animation for a series of icons. One of these is an ice cream cone and for its animation I'd like to have a cone spin into ...
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25 views

How do I make plants interact with the environment?

Vague, I know, but what I'm essentially trying to crack is: You know how if you have a plant on a desk against a wall or a bush that grows enough that the leaves start pushing against walls and other ...
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25 views

Is it possible to do Cloth/Hair Physics with bones?

I may be on completely the wrong track here, but I'm making a character. They have thick cartoon hair and a dress. If I weight paint the dress to the basic rig, it will not look great. If I have to ...
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20 views

What are some good physics properties for toys?

Speaking as a beginner who has had not experience with physics properties yet, I was just wondering if anyone knew of some good physics properties to use for toys. I have some plush toys in my scene ...
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50 views

is it possible to make this in blender

I can't seem to find any videos explaining how to make something like this. All I find are videos on how to make fluid flow from something. Basically basic fluid stuff. But I'm wondering if this ...
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2answers
77 views

Creating a Tentacle Ball in Blender 2.8/2.9

I saw this video on creating this Tentacle Ball in Houdini. https://vimeo.com/248824842 I am wondering what would be the most efficient way to create this in Blender. I am fairly new but trying to ...
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1answer
257 views

How do I get rid of the "black frame" of this condom mesh?

Hello, so I watched this tutorial and tried to replicate the 3D condom. It's either that or a donut and I don't like donuts.. Anyway, there is a problem as you can see on my second picture of this ...
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20 views

Blender objects moving before it interacts with another object

Why is the cups falling earlier before it even interacts/hit with the object? I have Deactivation Activated and I also have Applied the Scale of both objects. .blend File:
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How to start simulation from a negative frame?

I have checked: Allow negative frame is on. Use preview range is on. Cloth modifier's start frame is -30. But when I press play, the animation still starts from Frame 0. What did I miss?
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1answer
37 views

Demand Python script keep running until timeline animation stop

I have a script to run animation which is simulating sewing clothes. Below is a part of my code to add handle and start animation. ...
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1answer
59 views

Why won't this cloth hold still?

I've been attempting to simulate cloth in Blender for a character model. When I play the animation, the clothes will seemingly scramble all over the character. I've tried isolating the issue with a ...
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36 views

Laser-Beam Constraint over moving Mirrors? [duplicate]

For a newbie, how is it done to bounce the red line accurately based on the current position of the moving mirroring objects in the scene? I want to play around simulating mirror positions and seeing ...
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1answer
40 views

Soft Body crumples upon impact

I have a very simple simulation of a ball falling onto a ground plane. But every time I play the sim, all the ball does is crumple. My settings are down below. Why is it doing this? I want it to be ...
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1answer
22 views

Rigid Body Simulation and moving plane

I want to make a stone (active) break into a bunch of fragments (cell fracture). The fragments are hitting a plane. However, the plane is not static but rotating towards the fragments. I want the ...
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1answer
18 views

Stop running python script when animation plays, continue script after animation stops

I have writen a large Python script in Blender that does automatic sewing. First I will import a 3D-body, then import a T-shirt that is meant to be sewed. Then I place the body between the front & ...
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1answer
30 views

Blender rigid body ignoring the curve modifier

I'm trying to set up a conveyor belt system in Blender. I have something I think should be working, using an animation bound to a path with the curve modifier. However, the when the sim starts it's as ...
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18 views

Replicate skin movement in rendering

Hi i’m trying to replicate skin being repeatedly targeted, similar to this part of the video (0:03 to 0:10) https://www.youtube.com/watch?v=0XYbo1YGo0c I have a full body model i’ve already rigged, ...
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1answer
41 views

Getting rigidbodies to react to force-fields

I am new to Blender, and am trying to make a physics sandbox. My approach is to use rigidbodies that are attracted by force fields to form materials and structures. My original approach to achieving ...
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0answers
30 views

Model/Simulate cloth gripped by a hand

How could I model/simulate this kind of drapery in Blender: Or even better (harder?), with twisted motion: I have the hand's model, but I don't know how to put the cloth in the hand and make it look ...
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1answer
273 views

Filling a box with tools

As in this image, I want to fill a box with some tools. I applied rigid body (active) to the tools and box (passive). All objects are made in real-world scale. The object's shape is changed to MESH ...
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18 views

Is it possible to add spring bones on 2 different armatures?

I have an animation with 2 models, which means that they have 2 different armatures. I wanna use spring bones for hair, and breast physics. But it seems like when I stop the interactive mode so that ...
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1answer
23 views

Cloth simulation: object loses connection to hook

I want a cable to be dragged by an empty until the cable stretches out. I'm using a cloth simulation. The end of the cable is attached to an empty. However, the simulation works just until a certain ...
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1answer
25 views

Cube going through thin part of mesh in rigid body simulation

I'm trying to drop two "ice cubes" into a cup, so I set everything to rigid body and let gravity do the rest. However, the cubes are going through part (the thin part) of the mesh, yet ...
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1answer
23 views

How to different object do not fall apart in blender soft body?

I have a model of Minecraft wolf, which I wanted to fall down like a soft body. But, it has inner 7 parts, how can I join them to make a ballon soft body simulation? Thanks.
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1answer
25 views

Mesh requirements for Mantaflow effector?

I'm having trouble being able to make a mesh to use as an effector with a fluid simulation. No matter the shape I make (cylinder, cube or sphere with the top off and a solidify modifier applied to it),...
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25 views

Can I make custom force field that only rotates particles around an object?

Hi I want to make particles only rotate around an object. And I also want them to follow a simple equation $$ F \propto {1 \over r^2} $$ where $r$ is the distance of each particle from the object. Is ...
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1answer
66 views

How to make Mantaflow spawn less fluid without resizing source?

I'm trying to get a fluid simulation working so that I can have a character who's basically always dripping (he's kinda made of fluid? It's difficult to explain). I want to use Mantaflow for the ...
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1answer
57 views

creating a hanging hose with soft body

I want to make a hanging hose similar to this image. I have been spending a day to find a way to archive a real rolled up hose effect. Please help guys first I made the holder (not similar to the ...
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1answer
26 views

Distributed interaction visualization

I'm just getting started with blender and have been playing around with it for a few weeks. I have a pretty particular use case and wanted to see if blender could assist me in that. I have written a ...
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2answers
48 views

How would I go about making an object suddenly 'kick' up into the air, repeatedly?

I’m hoping to create a nice music driven animation, that shows an object ‘kicking’ into the air, a bit like a popcorn kernel popping, but in time with the music. What kind of approach would this ...
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1answer
62 views

How do I make a softbody "want" to be the way it was modelled?

So basically, I'm trying to add a softbody to an object (well, a curve, but same difference as far as I know). But when it's NOT moving, I want it to be in the shape I modelled it in (basically a sort ...
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0answers
13 views

How to make a dynamic paint brush from a fluid domain so fluid sticks on effector objects like paint?

Problem Hi! I'm trying to make a paint splatter that gets thrown on an effector with many polygons, and lets the color of the paint stick to the surface it touches based on it's shape, cause that's ...
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1answer
50 views

How to make 2 cubes with 'child of' faces crash, lose cube parent, and faces spray around and drop on the floor [duplicate]

it seems i have to re-ask my question.. delete parent halfway animation, keep position and more i have two cubes flying around, they are rigid bodies and have cube faces that are 'child of'. When the ...
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24 views

How do I construct a spring simulation without animation? [closed]

I want to model a mass on spring simulation; but not by using animation. How do I do this?
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1answer
43 views

Rigid body chain with armature breaks

I'm trying to make a chain rigid body simulation. I found I wanted to streamline it more, so I could rotate a bone to move the end/start, and I added a bone constraint to it as well, so that I can't ...
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1answer
34 views

How to animate an explosion in a certain direction? Why is my shatter going in the opposite direction?

Problem Hi. I animated a ball going through a window. The window shatters in the direction the ball comes from, but I expect it to shatter the direction the ball is going to. In ...
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15 views

Difference between Cloth's quality step and collision quality

There are two "quality" settings for cloth simulation: What are they for, respectively? When should I increase Quality Steps and when to increase collision Quality?
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16 views

Simulated "hard" cape/cloak

For example something like this: Or this: I'm not sure how these "hard"(?) cloths work in real life. In Blender my cloth always feels very soft:
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10 views

Why are cloth and collision simulations slowing downing down the animation when they are disabled?

After deleting 4 clothes with show in viewport turned off, the frame rate doubled. Also after removing a disabled collision modifier, the frame rate increased by a frame per second. This doesn't make ...
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1answer
57 views

How can i get the velocity of a moving rigid body?

I am new in Blender and I want to get the velocity of a moving object. I am not a programmer and I guess I have to create a Python code. Can you maybe help me with it, because I don't even know the ...
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12 views

Can I resolve the rigid body explosion without scaling?

Hi I am making a playground swing and wanted to make the chain realistic so for the first time I used physics. I set all of the chain links to mesh and made all of them dynamic except for the top one ...
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0answers
37 views

How do you make bangs with hair dynamics?

I gave up on just trying to add hair physics to an already made hair mesh, so I decided to finally look at the hair dynamics that's been haunting me the past few months. I was really impressed when I ...
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1answer
53 views

How to rig this puzzle

I've been trying to make this fidget toy and am having difficulty rigging. Would anybody know a way to rig this. Its a closed loop like a chain. and the pieces connect with a little peg so these can ...

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