Questions tagged [physics]

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

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7 views

how to freeze baked smoke simulation [duplicate]

I baked a smoke simulation but I just want to freeze the last frame so you see that the entire time. How can I do that? Im using Blender 2.83
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1answer
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Out of ideas - Is there a way to roll a string on a spool?

I can't find any answers or solutions that match what I need. Think of a roll of toilet paper - and as it's rolling, the spool fills up. I need that, but it needs to be string, so it would fill left ...
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Hilariously LOW fps!

I was working on a cloth simulation in Blender v.2.83.4 LTS. I made all the assets ready and also had modified them properly. Then, at the time I started the playback, I noticed a hilarious fps ...
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My domain for water is just a giant bubble

So I decided to wait a night before rendering the mantiflow tutorial done by CGGeek and when I opened the file today, my domain started showing up as like a weird bubble refraction type thing. I didnt ...
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2answers
68 views

Rigid Body Constraint: how to prevent stretching

I'm trying to use Rigid Body Constraints (type=Fixed) in Blender 2.81 to connect an assembly of rigid and cloth components. a crinoline cage By Crinoline, 1860-1870. Jacoba de Jonge Collection in ...
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1answer
32 views

Specific fluid sim look

I've spent the past couple months trying to figure out some fluid sim for a project. I'm trying to go for a specific (and slightly unrealistic) water flow look: However, I don't seem to be able to ...
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34 views

Cloth collision on a rigged character

Can someone please help me wrap my head around this. I have a character that is rigged and walking. He is wearing a trench coat. I am wanting the lower half of the coat to be responsive to his legs ...
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48 views

Is the Bullet physics engine completely deterministic?

Suppose I set a wrecking-ball to crash into a configuration of stacked cubes. Now I set the scene in motion and record where each cube settles. I then create exactly the same scene again, with cubes ...
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38 views

How to create wave splashes onto another object, such as a shiphull?

Effect would replicate the following and can be a mesh or effect.
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leakage problem in fluid simulation

I am trying to make water flowing through a pipe simulation. Below screenshot shows the inflow object(sphere) settings. Below screenshot shows the pipe object settings. It looks like the water is ...
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1answer
31 views

Pick an object up and then drop it

so I have read a few similar articles but I can't find a solution. Essentially I want to animate this iso shape to do several actions and then in a split second have it leave my keyframes and have ...
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1answer
51 views

Why does my cloth simulation mesh glitch after editing its geometry?

Okay this is really frustrating because it doesn't make any sense. I'm animating a cloak for my character. I run a simulation and it animates fairly well. I dissolve one line of geometry running right ...
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17 views

How to Add physics to multiple objects and make them behave as one?

I'm trying to add rigid body physics to multiple objects that I want behave as one(E.g Briefcase and the handle) I figured Ctrl + j(joining) them works but what if i want to manipulate my model for ...
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82 views

Can't Edit Cached Particles

I must be misunderstanding something because for the life of me I can't seem to get the editing of a cached particle system with Hair Dynamics to work. I tried in 2.83 and 2.9, but in both all the ...
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19 views

Is there a way to stop an object from falling right away?

Total newbie here. I’m making a bouncing ball animation and I want one ball to fall first and once it’s settled, I want a bunch of balls to fall in, but I can’t seem to figure out how to stop all the ...
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2answers
57 views

How do I keep the two objects from penetrating each other in Blender?

I created the object by first creating the edges to the curved face with the script below followed by adding a face and then extruding it. I made sure to change the Source property under Collision to ...
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1answer
67 views

Best way to achieve floaty bouncy physics?

I'm trying to achieve non-realistic bouncy physics, specifically for ears and tails like the physics shown in these example Example 1 Example 2 I've tried with the spring bones addon and blender's ...
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20 views

Record water / liquid simulation animation to then transform it?

is it possible to record an animation created through water liquid simulation on a plane. Then fix this transformations that where recorded so you can transform the object without recalculation the ...
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17 views

Selective cell fracture

Hi i'm trying to make a scene where a bullet shoots itself to the corner of a concrete wall, making the corner pieces fall off. But i'm not sure how to do that without the whole wall breaking. also ...
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2answers
131 views

How do I create a physics interaction followed by an explosion (that continues the physics)?

I am relatively new to blender, and while I am pretty conversant with the main hard-modeling tools, I'm notso-hotso when it comes to physics. So I'm experimenting with some simple forms and ...
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81 views

How can I catch Rigid Bodies using a Cloth in Blender 2.83?

The Problem So far I have not been able to perform a Rigid Body simulation on one object and a Cloth simulation on the other and have them interact with each other simultaneously. The effect I want to ...
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22 views

Cloth simulation not appearing in render. Works and plays properly on viewport

Been tackling this problem for some days now as I tried to get to the bottom of it. As the title says, I do a simple cloth sim, and even bake it. Upon rendering, the scene is as if no simulation was ...
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12 views

Activating the Paintmap and wetmap attribute to multiple objects

I'm working on a project that involves the use of dynamic paint, i have just one brush but over 100 canvases because i used the crack-it addon. How do i enable the wetmap and paintmap to all cracked ...
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19 views

How to put an active rigidbody inside the other without crossing the other during the simulation?

How to put an active rigidbody inside the other without crossing the other during the simulation? I'm trying simulate physically a motor, now I get the problem when the motor shaft crosses the motor ...
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cloth become very unreal near vertex group

I am trying to make a realistic cloth on human body. When I add the cloth component and set up the pin groups and start to run, the vertices around the vertex group becomes jaggy, very unreal. all ...
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20 views

Apply one acceleration to all objects

Can I make a force field that affects every object according to their mass, so that all objects accelerate at say 1 m/s^2, is that possible in blender? If not possible via UI is it possible via ...
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77 views

Can not bake my fluid simulation to keyframes, blender 2.83

I am new to blender and trying to bake the fluid simulation I made. However the option "bake to keyframes" is not allowed even when I selected all the objects. Can anyone help to figure out ...
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24 views

How to make splash on2. 83

I'm new to blender, just trying to understand some basic tools on blender. So I tried converting a cube to container that the water will be on and adding a sphere which will drop on the container ...
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1answer
44 views

Animating active object in physics simulation

I would like to pick an object from a conveyer belt.but I find difficulty in animating the active object(rigid body simulation) and assigning 'child of' constraint to the active object which in this ...
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Comparable systems between 3DS Max's Reactor physics system and Blender's physics system

I'm currently working on on a script to support exporting content for Halo 2 Vista in Blender. The original tools worked in 3DS Max with Reactor support. Reactor being a physics simulation setup using ...
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16 views

Cloth collision is calculated incorrectly when objects are rotated to degree values that are not multiples of 45?

Cloth object appears pulled through and/or around the collision object at certain rotation values (explained below). I encountered this issue while attempting to create a model of a simple scroll. I ...
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Accessing mesh vertex positions in baked physics

I have a scene with a cloth and I wrote a script to bake physics for X frames. However, when I access the vertex positions for different frames, they remain unchanged. I searched online and realized ...
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Why are my rigid body objects falling out of their moving container?

I have created a lottery ball cage as it were. The cage is a passive rigid body. Inside the cage are about 200 lottery balls with rigid body active settings. The cage spins for about 20 seconds, then ...
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1answer
82 views

How to make a 2D ragdoll

I can't find a solution to my problem anywhere on the web. Maybe I don't know how to search for it. I have this 2D character that is set up the same way that those cardboard cutout puppets with pins ...
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1answer
54 views

When sculpting cloth nothing happens, object turns dark

I'm new to Blender and I'm following Blender Guru's tutorial on YouTube (https://www.youtube.com/watch?v=HlrgFS8AMMU at about 11:59). So far everything has worked according to plan. First I added a ...
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2answers
131 views

How to create tentacles moving with the wind?

I have the feeling i'm on the wrong way to do this. Because its part of the mesh. So, maybe somebody know it. How can i add movement to the tentacles in the wind? Like Hair. Sadly the whole mesh move ...
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21 views

Can I make an object a liquid or soft body and then go and edit the mesh as it is moving?

I am new to blender and was wondering if this kind of project was possible. I want to make a salvador dahli dripping clock and was wondering if this work flow would work for 3D printing. First, I make ...
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10 views

my particle system is not visible in vertex group

so , i was trying to make a simple rocket propulsion animation , and was following similar steps to the ones in the veritisum tutorial for explosion , so , but , the particle system is not getting ...
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1answer
70 views

Why does my smoke domain stretch the simulation?

Trying to set up a basic simulation and hitting a few problems. Will separate out into a few questions though. My first issue is when I resize the domain object for a simple cube using quick smoke, ...
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136 views

How to change the direction of motor rotation?

What am I trying to do? I tried make a small motor (2cm) because I need simulate (physics, not only animation) this, but I can't its rotation correctly. See in the image, I have a "Motor Body&...
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6 views

Problem in animated Hair practices [duplicate]

I have assigned vertexes on the head where hair grows from. I am now in the stage of animation. My problem that when I move the head of my cartoon, hair does not move with the head. What shall I do, ...
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25 views

Why do my rigid body objects have gaps in between them?

I have tried to make a rigid body simulation to make apples look more realistic but when I start the simulation, apples are not touching each other they have a lot of space between them and when I ...
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24 views

How to model clay falling into a mould (physics)?

I want to model a ball of soft clay falling into and filling out a mould in the physics engine of blender. What type of physics would a i.e. cube need to fill out the mould. Cloth is not quite right ...
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1answer
63 views

Blender cloth animation isn't working properly?

I am using Blender 2.8 and I have been trying to make a realistic-looking fabric on my bowl. But it is starting animation early and becoming something like in the photo. I have tried it on a cube to ...
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19 views

Make multiple objects expand (and smush) together inside container

I've tried to do this a few times and have only come across this post - Scaling a Soft Body object which has helped and the video the person references is exactly what I'm after - but their softbody ...
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28 views

Bake to key-frames isn't working properly, and Eevee is using 100% CPU and 40% GPU?

So I'm making a physics-based animation of a ramp with "some" cylinders rolling down it. I started off simulating the physics, then baked the simulation then tried rendering it. Even with ...
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2answers
48 views

How to make balls fall in Blender without passing through each other?

I am trying to make an animation to look like this. Do you have any suggestions on how i can make many balls like this fall down on to each other? I do not want them to pass through each other and ...
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My hair doesn't flap in the wind

I have a logo consisting of two letters covered in fur that I am trying to get blowing in the wind for a client project. I have a wind force field on which is affecting the hair fine, but the hair ...
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Exclude certain vertices from cloth sim collisions

I am making a sleeve that "abstracts away" detail by getting darker on the inside. I am doing this by giving the inside depth: I need to prevent the selected faces from participating in any ...
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is there a way to constrain selected to nearby objects/face/etc. for more realistic collisions?

So I'm trying to make a realistic bullet animation and I wondered about the following points: is there a way to constrain surrounding objects to the selected? is there a way to select objects/faces/...

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