Questions tagged [physics]

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

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26 views

How could I make an object semi-rigid or or semi-cloth?

I'd like to make a film roll, complete with the film itself sticking out a few cm from the canister. However, as I'll be running a simulation with a bunch of them colliding, I believe I'd first have ...
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15 views

Choose what rigid-body is affected by a force field in Blender 2.9

I have a conundrum, I have a bunch of rigid-bodies that I would like to travel to different locations. On their voyage to their location I’d like them to be able to interact and collide with any other ...
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46 views

Dust vortex under helicopter

I have a helicopter model and I have it flying above a desert. It is stationary but with the blades moving over a desert with an ocean mod. How do I create a realistic dust and wind vortex on the ...
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2answers
43 views

How to add physics to the object that already follows another object?

So I want to make string of lamps. The string has cloth physics, and I want lamps follow it. I created empties that have constraint to follow string's assigned vertex groups. And it works ok I guess. ...
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1answer
52 views

How to create Wind effect on circle logo

I am trying to animate a logo in the shape of a circle. The idea was to have it floating in the air and have some wind going through it. What I have done so far: I have used cloth simulation and the ...
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Is it possible to combine rigid body and soft body physics in the same object?

In blender as most of you know there is an option in the animation tab to have soft body and rigid body physics on an object. On a project that I am currently working on I need soft body on one part ...
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1answer
75 views

How to decrease the size of particle for fluid simulation(2.9)?

I'm following this YouTube tutorials and making fluid go through the pipe. https://www.youtube.com/watch?v=3ChtnI8GNtM When I make pipe very thin (e,g, 0.03m in diameter), then particle size of fluid ...
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Collision physics. Rotating object constantly hitting coffee beans in a grinder or roaster

I would like to make a collision with a spinning object in a coffee roaster/grinder and the coffe beans being roasted/grinded. I have tried with rigid body physics and collision physics, without any ...
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14 views

Change liquid density in flow simulation

is it possible - and if yes how - to change the density of the liquid in Blender? The viscosity can be changed, but if the liquid has also another density, e.g. liquid steel with about 7000 kg/m**3, ...
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1answer
32 views

Create a loop of falling objects

I'm trying to create a scene with marbles falling down on a plane, I want to loop this like a long gif to where it seams like infinite marbles falling. The problem I am having in getting it to loop ...
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1answer
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Fluid simulation not working properly

basically i wanted to create a fluid simulation in which the liquid (soy sauce) pours out of a kikkoman bottle. I've already set up the domain, the flow emitter inside the bottle (tried to use both ...
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1answer
24 views

Where is Smoke in 2.83.10?

I am trying to create something that requires the Physics > Smoke and it's not shown on my physics panel. The version I'm using is 2.83.10 and I have included a screen shot of my physics panel and ...
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40 views

Animate a self-solving rubik's cube

I am trying make a cube scene in which the cube will interact with ground while solving itself. I'm giving link to a real video, in case you are wondering how the scene might look. https://youtu.be/...
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341 views

Blender Soft Body deforming too much

I am extremely new to blender, I am attempting to model some sandbag physics for a 3d printing project. I want the sandbags to have a nice look to them. The video below shows the issue I am having. I ...
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1answer
32 views

How to make wheat stalk stiffer in Cloth Physics?

I am making a wheat field that uses cloth physics to help each stalk move realistically with the wind. However before I convert the particle system, I need to look for the best numbers to plug into ...
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25 views

How to Copy a settings from a Cloth object to multiple Cloths objects (e.g. Physics Properties > Cloth > Object Collisions > Distance)

I have a scene with multiple cloths objects. I want to modify something in physics properties to all others objects (same settings for Object Collisions>Distance); Something similar with "Copy ...
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1answer
33 views

Cloth collisions with another cloth

I am trying to create a scene where a cloth will collide with another cloth; The error is where the clothes are interacting and after that is going wrong.... I have attached here the blender project: ...
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25 views

Dynamically calculated center of mass

The center of mass changes for an organic object when it moves its body parts. Because Center of Mass is key thing with physically correct animation is how to get the center of mass dynamically? Such ...
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19 views

How do I properly delay activation of an active rigid body physics property?

I have worked out the proper use of the Start Deactivated tab on the Rigid Body properties, and the ceiling pieces are acting as they should, being broken by the mesh coming down from above. Following ...
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18 views

How can we make an solid object being squashed by another, turning the first one into fluid?

everyone. My issue is that I don't know how to make an object splatter another. I have a text appearing on screen like so. I have it recovered by a second text in the same manner. I would love for the ...
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2answers
107 views

Water simulation hangs over the surface of the collision object

I created a water particles but they seems to hang over the surface, why is this happening? Still the water hangs over the ground even with Collision Surface Thickness zero:
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18 views

Is it possible to do cloth simulation with imported obj files?

The question might look dumb but I was wondering if it’s possible to do cloth simulation with a cloth mesh that I imported (for example, a dress in obj format) I already tried that but the dress is ...
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254 views

Setting up complex gear physics

I want to set up a rigid body system of gears hanging off gears. The picture shows what I want to happen: The small green gear rotates in place, the big yellow gear is hanging off it. The small ...
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Animating Physics properties

It seems I'm still not doing things right for animating the physics properties. I have tried to Keyframe the "active" function on Rigid Body so that the object will begin its crumbling at ...
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22 views

How can I create a ceiling being broken?

Using Blender 2.91 - I have already learned how to use the cell fracture add-on and how to break things up, but my lack of understanding is in how to keep a pre-broken section of ceiling from falling ...
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21 views

How to improve animation quality of rigid body simulation

https://en.wikipedia.org/wiki/The_Method_of_Mechanical_Theorems?wprov=sfla1 I posted a Blender animation on wikipedia which I think could do with some improvement but I am not good with graphics.  ...
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2answers
162 views

How to smooth out different interpolation types

I am trying to complete a blender animation where a ball rolls down a slope under the influence of gravity. To simulate gravity I have calculated the time and distance the ball needs to travel to ...
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1answer
24 views

Why is my rigidbody broken?

Both rigid bodies have mesh collisions.
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14 views

Blender Crashing While Baking Multiple Particle Systems

I have a scene with quite a bit of complexity with 24 particle systems running in it and ranging from around 4000 - 23000 particles each. Blender crashes while baking the dynamics. It stops responding ...
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1answer
22 views

Pausing a cloth simulation

I am making an animation where a default cube is launched from a tube and explodes. I have a particle system and an Explode modifier and a cloth system to simulate an explosion with cloth like ruins. ...
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7 views

Hook moves from vertex during rigid body simulation

Hi, During my rigid body simulation the hook is riding up the side of a ball rather than remaining fixed at the vertex where the join was made. I set the rigid body constraint to Point. How can I get ...
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9 views

nurbs path join breaks during rigid body simulation

I joined two nurb paths in inverted T shape to create a scale balance to show the equilibrium reached after the scales are swung around a pivot. The initial position is raised at 60% and I am ...
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25 views

Connecting keyframes and physics animation in one scene

I have a liquid physics animation. It animates from 1 to 100 frame. GIF: https://gfycat.com/ru/mixedweeharlequinbug Parallel I want to animate cube with location keyframe. Scenerio is: Cube starts at ...
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32 views

Soft Body rope extends infinitely— how to constrain?

I followed this tutorial to make a 'cord' that joins two objects in my scene (basically a path with two empties and a soft body modifier). I'm mostly happy with the collision but it seems to extend ...
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22 views

Can you make the Direction of Gravity dependend on the Rotation of an Object?

Ok so here is the Visual Example of what i mean: The arrows show in which direction Gravity is pulling. So, is there anyway to do something like this ? Maybe that Gravity is depended on the Normal ...
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18 views

Quick Smoke doesn't work in Render

So no matter what I've tried until now (digging through developer forums, watching tutorials, etc.) doesn't fix my issue, where when rendering my animation in Cycles or Eevee neither the smoke nor the ...
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1answer
36 views

Nurb path not rotating or moving in lower section of double pendulum

I would like advice on best approach to simulate double pendulum as rigid bodies. I tried 3 UV Sphere connected by strings as nurb paths extending a youtube simple pendulum Blender example which I did ...
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1answer
65 views

How to fix Cloth Simulation from this odd compression

The objective of this simulation was to just have the cloth hang down so part of the tent door is open and part is hidden behind the tarp. Originally it was a simple plane, I have recently solidified ...
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164 views

Can't Find Color Mapping for Fluid Simulation in 2.9

I can't find the color mapping option for fluid sim in 2.9 where is it? I go to viewport display in my setting but can't seem to find it. Thanks in advance
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1answer
111 views

Help with smoke and liquid simulation in Mantaflow

Original Post This is the problem that led me to post this. Whenever I scale the domain of a smoke simulation, the inflow object's smoke also scales up/down. Applying the scale of the domain does not ...
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40 views

How to Make a Rigid Body Car in Blender

I am making a car with blender and I want the car to ride with rigid bodies. I already have the wheels and they are all moving and reacting to slopes but now I want them to connect to the rest of the ...
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41 views

Object>>rigid body>calculate mass: mass estimates are bit out on shape created using Maths Mesh tool

I was hoping to use Blender to calculate the mass of shapes with curved surfaces. To start I took a 1m cube and performed a boolean difference with a parabolic curve (x=0 to 1m)that was extended ...
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22 views

How can I correctly apply wind on grass (hair particles)?

I made a hair particle system of grass and wind and turbulence force fields. But the wind doesn't seem to affect the grass particles and the turbulence when translated, just resizes the grass rather ...
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1answer
50 views

Attaching a rope (curve or mesh) to two other objects [duplicate]

I've already read two threads on this but the instructions given are not clear enough for me. i would like to attach the ends of the highlighted mesh, so that animating this part isnt so tedious.
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9 views

How are stiffness parameters in cloth objects are coverted into real-life cloth stiffness parameters?

Everyone. I am doing an experiment where I want to know how to convert stiffness parameters in Blender into real-life cloth stiffness parameters. I have searched online and found that stiffness ...
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13 views

Ocean Modified mesh has disappeared upon reopening file

I have two oceans that are both no longer visible, both created from the start cube (one was duplicated). They aren't visible in the viewport or any renders even with the visibility icons toggled on. ...
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1answer
73 views

why is my rigid body object not falling correctly?

I have a model of a cup that I want to fall on the ground. The issue is that once it hits the ground it doesn't rotate or anything so only the rim of the cup is making contact with my passive object. ...
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18 views

How can one create Physical based Impact deformation?

So my goal is simple. This: https://youtu.be/f7F5tef1ACE?t=34 Creating a ricochet is all to easy. Just some rig Body stuff. But dont know of a way to make the Mesh Deform with according to the Impact....
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1answer
43 views

Best approach for a random terrain rolling ball animation?

Simple question, just looking to be pointed in the right direction as I am somewhat new to things. I'm creating an animation where a ball shaped robot (think BB8) has to roll around various terrains ...
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1answer
21 views

Determining the optimal suspension location for jewelry

I'm creating jewelry with Blender and I'm wondering about finding/calculating the optimal suspension location. Looking at the image I uploaded, you see a small eyelet. I've used the chain simulation ...

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