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Questions tagged [physics]

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

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How to prevent soft bodies from moving and only deform?

I'm trying to vibrate a uv-sphere using soft body dynamics. But along with compressions, the sphere also drifts away as shown in the animation. Please provide a solution to prevent its translation.
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1answer
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How to add different physics properties to different edges of a same object?

I have a uv-sphere with faces removed. I wish to add spring property to all individual edges of the sphere. Being a beginner, I'm finding it hard to do. So I'd like to know how to assign physics ...
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Does anyone know how to make that liquid in Blender 2.8 ? Link provided

https://youtu.be/04v4qWVtdPs?t=134 I might have some ideas on how to make it, but honestly, I am not sure if it's going to work, I am not that experienced with simulation. If you guys got anything to ...
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Simulation of rubber material attached to two objects

I start my work in a blender and I have to do animation of fins for advertising, the model I received from the client, it will be attached to the foot, the movement of the leg will also move the fin (...
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1answer
32 views

How do I remove a cloth pinning at some point of the animation?

I'm quite new in the blender world. I'm animating a balloon that has three fix points when it inflates/deflates and I want it to fly away at a certain point of the animation following the physics I ...
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10 views

What does surface thickness do in Liquid Physics and how to calculate it?

So I want to create a simulation simulating liquid splashing onto an Effector and rolling off. The problem is that when the surface thickness is too low, the liquid just phases through the Effector. ...
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Unable to get Fluid simulation to work in my Blender 2.82

I am watching 3 different tutorials on creating liquid in blender. They all lead me to the same failed outcome: After setting the domain object for the fluid and outflow object for the fluid and ...
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1answer
33 views

Clothes don't collide to its parent : a rigid body

Description of my scene : I have a human face mesh (an alembic file in movement) and ropes made with single vert and whith cloths properties parenting to my face (as child) When my face moves, ropes ...
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Balloon Soft Body - How to stop inside faces clipping outer faces?

I'm trying to animate a balloon dog but whenever i run the simulation the inside faces of the balloon keep clipping through the outer. I'm kind of new to this and have tried all i can think of and no ...
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hair dynamics doesn't work perfect. I tried all options and nothing. the hair passes in the body

I have tried: increase path steps no children increase emission segments increase collision quality but.... look at this: How do I stop the hair from clipping through parts of my mesh?
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1answer
15 views

Book Shelf: Rigid Body Sim- Books thrown out

I'm working on a bookshelf animation, nothing fancy just the books falling into place. I applied rigid body properties to both the book (active) and the shelf (passive). Upon playing the simulation, ...
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1answer
20 views

How to prevent 2 seperate meshes that have soft-body modifiers from clipping into each other and glitching, even if collision is turned on?

What I want to achieve : 2-5 meshes all of which have soft-body modifier. I needed them to bounce onto each other, flop off each other, etc. What I have done so far : Created 2 meshes. Have a plane ...
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How can i have different mass on same object?

So, I am building a project that has double pendulum, like one pendulum attached to another pendulum... So i created a cylinder and scaled it up and made it like a thin long rod and then i added a ...
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How do I control the Outflow and Inflow amount in Mantaflow?

I know I can change timescale, but then if I have inflow and outflow in one domain I cannot do something like making like a the sink clotting or something, and decrease outflow to not be able to match ...
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(V2.83.0) Mantaflow fire + gas - How to scale emitter

I have been testing mantaflow for the last few days and have a simple problem. I want to create a rocket launch animation. Now fire and smoke should come out of the engine. This works great. But the ...
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2answers
21 views

How to make 2 objects not intersect each other?

I have made an animated rigid body active character and the ground is passive rigid body. But the character's feet passes the ground that I don't want to happen.I want to move character so I don't ...
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1answer
28 views

Set material density [kg/m³] instead of mass [kg]

Is there any way or plugin which allows enter material density in [kg/m³] instead of direct enter real mass [kg] how it is now in Blender. Blender knows the exact size of the object, so it is possible ...
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22 views

How do I get smoke to properly come out of an object and interact with an environment?

I'm only new to blender but I've modelled a room and used flow physics to make it collide with fluids. I've created an emitter through quick smoke, but it doesn't look like the smoke is coming from ...
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Fluid simulation - Where are the slip options for domain boundary and collision effectors in Blender 2.82 and above?

I'm sure I've seen these options before, but I really can't find the settings for the slip type in Blender's UI - at least not in 2.82. I found them in the documentation for 2.80: https://docs.blender....
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1answer
41 views

How to attach a rigid body to a cloth simulator

I'm trying to make a parachute that can hold rigid body items as they fall and slow the rigid body's fall. I've tried using wind to make the parachute fall slower, but I can't figure out how exactly ...
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1answer
17 views

Physic-based fur/hair on an already animated model from an external software (Source Filmmaker)?

So, I was looking up tutorials on physic-based hair or fur in Blender. However, while I found a ton of different tutorials on the subject, I couldn't find one where you could just overlay the fur or ...
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47 views

How can I make a wall collapse from the top?

I have a wall made up of many cubes and I would like to make it collapse starting from the top, row by row, kind of like a domino effect. I am pretty new to Blender physics and just can't figure out ...
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1answer
31 views

Mantaflow - creating smoke out of fluid particles

im trying to implement mist in my water scene, to do it im trying to use spray particles as a way to generate gas, but yet didnt find a way for it to work. I know it is possible in FLIP Fluid addon ...
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1answer
22 views

Change start and end frame of rigid physics simulation with python

I'm having a lot of difficulty trying to change the start and end frame of a rigid body physics simulation with python. Changing the settings in the UI shows the following in info view: ...
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1answer
6 views

Is there a way to analyze what's using frametime or view all simulated meshes at once?

I have relatively large scene in which I did some cloth simulations. I'm sure I don't have any simulation enabled (went through all visible and invisible meshes). But even without apparently nothing ...
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1answer
23 views

How can I add soft body physics to multiple objects at once?

I am trying to create a "soft body physics method" on an object, but is there any method which can apply it on multiple object at once? (I am not talking about rigid body physics.)
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1answer
14 views

Interacting with rigid body objects as animation plays [B2.83]

In Blender 2.83, I do the following steps: create a plane and a cube. Give 'collision' physics to the plane, 'cloth' physics to the cube. run the animation simply move the plane around by pressing 'G'...
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1answer
30 views

Floating Plastic bag in Air with Wind

I tried to recreate a plastic bag after watching a tutorial but failed to achieve the desired look. The plastic bag is supposed to be floating and moving with the wind but instead, while playing the ...
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0answers
38 views

Dual gravity for a fluid simulation (looping animation)

I'm working on this looping animation. When the character falls backwards I want the fluid sim to splash upwards as usual. I've set this up and it's pretty straightforward. What I'm struggling with is,...
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1answer
44 views

How can I add mass to part of a cloth simulation?

I'm working on an animated scene with quite complex cloth simulation (2.83-2.90). Multiple characters and layers of clothing. The dress in the foreground is working perfectly now after much error and ...
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0answers
10 views

Delaying rigid body sim not working in my scene?

So I'm making an animation where an object goes around the area "Spitting" monkeys around The idea is that it spits one, then goes to a new area, then spits the second, then the third area ...
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21 views

FLIP fluid simulation does not detect collisions anymore

Sorry for such question, but someone is getting dumber by the second (me or blender): fluid collision stopped working completely (worked before by some miracle) Domain is set, fluid set as Geometry, ...
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1answer
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Blender Best Car Crash Problem [closed]

I have been trying to find the best car crash with the following conditions: Rotating wheels when car is accelerating Car skidding, thus front wheels turn left or right (image the driver trying to ...
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0answers
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How do I animate the multiplying of bacteria?

I need to animate the multiplying of bacteria. Starting with 1 bactery, this one splits itself in 2 bacteria, these 2 in 4, these 4 in 8, these 8 in 16, etc. This is called exponential growth. These ...
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Bake button is missing 2.82/2.83 [duplicate]

I was following a fire tutorial (https://www.youtube.com/watch?v=ezm-ID9ubno&t=227s) on YouTube and got to the part where I have to bake the simulation and I noticed that I don't have a bake ...
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1answer
23 views

How to fix gap between rigid body objects? [duplicate]

I've having some trouble animating my donut. When it reaches the surface there's a gap between the objects, and sometimes the object jitters and bounces when it reaches the surface and I don't ...
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2answers
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Cloth simulation doesn't work for particular object

I'm trying to follow this tutorial: https://www.youtube.com/watch?v=1bGB-EePxWI But when I apply the cloth modifier and playback, the object doesn't drop as it generally would I'm pressing playback in ...
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1answer
28 views

Why doesn't my effector work like I want it to with the new Mantaflow (Blender 2.82)?

I want the plane highlighted in the picture to work as kind of a surface for the water simulation to run through, but when I go ahead and simulate it, it just goes through the object like if it was ...
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0answers
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Smoke is not showing up in Properties Tab

Smoke isn't showing up in my properties tab in Blender 2.8, what can I do?
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52 views

Looping Fluid Simulation - Boolean Performance

I am trying to create a looping fluid simulation. This is something that I have never seen done elsewhere, without faking it in post/sequencing, but I think that my method should work. The ...
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1answer
25 views

How do I disable physics for multiple objects at once?

I'm using multiple rigid body spheres to fill a mesh after I converted them from particles to mesh. Now after a few frames of them jumping around and reaching equilibrium(almost), I want to freeze ...
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0answers
23 views

Hang an object Rigid Body [duplicate]

What is the easiest way to hang an object with Rigid Body while still allowing the object to freely swing? An example of what I mean is like a Church Bell.
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1answer
29 views

Why doesn't rigid body physics work properly after I add the Build modifier?

I have a cube, a plane and a ball. At first, I set the rigid body physics of the cube and the plane to passive and the ball to active. I set the strength of the force field physics of the cube to 0 ...
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1answer
19 views

How do I make an object attract another object?

I have a ball and a cube a bit above it. I want to make the cube attract the ball towards it. I am new to blender so how do I do it?
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24 views

How do you keep simulation bake data in different scenes?

I have a cloth simulation that I want to render in Eevee to achieve a certain NPR look, but also render a shadow on a shadow-catcher in Cycles. I've done this kind of thing in the past without any ...
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1answer
17 views

Origin doesnt follow physics Simulation

Trying to make the camera always face a cloth Simulation. The problem is the Origin doesnt move with the Simulation and by that the camera always looks to where the Origin was at the start of the ...
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1answer
20 views

Forces field Wind does not affect hair

everytime I try to add wind in my scene the hair is still static. Only if I move the wind object the hair is moving. But if I dont do that the hair goes in the right direction but doesnt move. I have ...
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1answer
16 views

How to animate a closed string as in string theory

How would I get a circle string to wiggle, as in the attached link? https://www.dailymotion.com/video/x7tvtxv
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2answers
32 views

Blender Mantaflow - How to make fluids come out with pressure? Like from a hose?

I'm trying to make a liquid simulation with Mantaflow where the flow of the liquid respects the flow object's local rotation, so it looks like water spraying in different directions. It looks like the ...
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1answer
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How could I add the FLIP Fluids obstacle component to multiple objects at once?

I'm creating a simulation involving a cell-fractured object. There are 600+ objects in my scene that have to be FLIP Fluid obstacles, is it possible to add the component to each object automatically? ...

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