Questions tagged [physics]

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

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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 ...
Dummy Scripts's user avatar
4 votes
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222 views

Geometry nodes: calculate the cross sectional area of a moving object

I'm trying to model the drag force (Fd) on flying objects. I would like to make the model procedural, so in which I now choose to use points, on which I later can instance. The drag force formula is: ...
EwSa's user avatar
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What are possible options to flatten an object due to weight and viscousity, or fake it :)

I've modelled this kind of toothpaste piping. Trying out beziers etc. Now I'd like to make it look as if the matter is being squished a bit, via gravity or some other technique. The look I'm after is ...
Christo Steyn's user avatar
4 votes
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162 views

Multiple balloons floating on strings

I have a scene with multiple balloon text shapes, each on a string, like so: What I'd like is to make each one bob up and down a little as if they are pulling against their strings, and ideally react ...
Andy's user avatar
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Geometry nodes and physics?

Can Physics be used in conjunction with Geometry Nodes (Blender 2.92+)? I have a attribute sampled plane using a scaled Cube as the point instance. I would like to apply a gravity (Rigid Body World/...
PLM MPT's user avatar
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Shading according to velocity

I have a rigid body simulation of many objects and would like to change how they're shaded depending on velocity. It's easy to get location from object info node, but how about change in location ...
Marcin's user avatar
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267 views

How To Model Ornamental Grass Procedurally

I am trying to model an ornamental grass procedurally (Miscanthus sinensis 'Gracillimus'). I want to be able to do this procedurally (not combing for example) because, unlike normal grass, it has a ...
Vince's user avatar
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4 votes
1 answer
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Mechanical roller animation

I am making animations with rollers that move cubes. Here is a video I already made. I animated the cubes by hand... link to youtube video I am wondering it is possible to use physics to automate ...
username's user avatar
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How can I make particles not pass through the surface and not get "stuck" in it?

I want to make the falling autumn leaves. I did a system of particles, but when the leaf particles reach the surface, (to which I applied collision modifier), they do not entirely remain on the ...
Rumata's user avatar
  • 2,677
4 votes
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589 views

Why is this happening when I bake physics to keyframes?

So, I'm trying to do some stuff with physics and cell-fracture, and I need motion blur. When I bake the physics and render w/ motion blur, the objets aren't in the scene. So I tried baking the physics ...
Brennan Hopkins's user avatar
3 votes
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23 views

How can I use physics to create a bobble head?

I'd like to create a bobble head type set up. A smaller cube (the head) slightly higher than a larger cube (the body). When the smaller cube is hit by another physics object I want it to behave like ...
user2581925's user avatar
3 votes
1 answer
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Why is this object not colliding with a cloth?

I am trying to make a plastic bag with Why is this blender cube with: A collision modifier with single-sided disabled Not colliding with this cloth with: Object collisions enabled A thickness Here ...
ifthisthenthat's user avatar
3 votes
0 answers
53 views

Is there a way to make a weathervane simulation

I was wondering if a weathervane physic simulation was possible (i.e. a weathervane that is pushed by a wind). I can create something that looks a bit like it (thanks to Chris) but that is not ...
moonboots's user avatar
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Objects falling through an animated hole

I have this little project going on, where I have a plane with objects standing on them. The plane has a hole, and I want to animate the hole around so that the objects standing on the plane just fall ...
Simonpeterpaul's user avatar
3 votes
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176 views

Rotation to rigid body objects

I can't really find much about this and most of answers I do find are rather outdated. Is there any way to get rigid bodies to rotate by a force? For example I would like the cubes in this "...
Haiku's user avatar
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432 views

Geometry nodes instances animation, then apply Physics?

I'm trying to add Physics to some Geometry Nodes instances. I have an animation in GN, where the instances moves up, then to the right, and then I would like to apply Physics to make those instances ...
Olivier's user avatar
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237 views

Can this Houdini curl noise flow effect be done in Blender?

Can we make the particles flow across the surface of a sphere like this? Maybe using forces? I tried using a negative force field to attract the particles to the surface and tried using the vertex ...
Jamir Alam's user avatar
3 votes
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87 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 ...
AlexWillis21's user avatar
3 votes
0 answers
254 views

How to calculate velocity and momentum of a rigid body

I have a simple animation in which there are two planes and balls on the planes. There’s one ball on an inclined plane, and a couple of balls sitting on a horizontal plane below that ball. When the ...
nibelungen's user avatar
3 votes
0 answers
44 views

Equations governing softbody simulation parameters?

What are the equations that specify how settings like "Pull", "Push", "Damp", "Bending", etc— combined with mesh geometry and simulation state properties like ...
Will Chen's user avatar
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Is blender suitable for motorcycle crash simulation? (Semi-scientific)

I’m a long time 3d animator (20 years using 3d studio, Max, Maya). However, I’m retired from CGI work and now I’m MacBook Pro 2019 based. So my software options are limited to Blender or Houdini. I’m ...
Martin Foster's user avatar
3 votes
0 answers
643 views

How to animate small fire flames

I am just starting with blender. So, sorry if my question seems dumb. I saw some videos on quick animations and I am amazed with it. However, fire animation seems not to work when I scale the domain ...
Brasil's user avatar
  • 352
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1 answer
33 views

Is there a way to see more physics setting for an object?

I was following a tutorial oh how to make a basic water simulation then I got to the part where I enable the domain's mesh and couldn't find the "mesh" checkbox anywhere. I seem to be ...
Parker P's user avatar
3 votes
0 answers
128 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 ...
ruAnimus's user avatar
3 votes
0 answers
349 views

Metal Deform in 2.8

I am trying to simulate a car crash in blender 2.83, but I am having some trouble figuring it out. I want it to be realistic, but also dynamic. I want to the damage to vary depending on the impact. I ...
Volvo240's user avatar
3 votes
1 answer
259 views

Understanding rigid body physics

I'm following this great tutorial https://www.youtube.com/watch?v=1gM8yEMFMjg to learn how to fill a mesh with a particle system but am having trouble replicating the simulation (at 6 min 50 sec if ...
user3821345's user avatar
3 votes
0 answers
173 views

How to animate ribbon unfurling?

I have to animate ribbon unfurling an box opening. Like below. Got the box part down, but I'm stuck on the ribbon. What would be the best way of going around it the ribbon. Would it be best done with ...
spockerrs's user avatar
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3 votes
0 answers
972 views

How integrated is the bullet engine in blender?

I'm a beginner, and I'm going to use blender to render thousands of images as a data set.In the meantime I need to use the physics engine.I was going to use bullet+blender as my solution.But you see ...
Daniel Lee's user avatar
3 votes
2 answers
1k views

Is there a way to simulate water balloon physics in Blender?

Trying to animate something in Blender and I thought I might try and give it water balloon physics. I don't know how to simulate these kinds of physics so I was wondering if anyone has any suggestions....
SamtheMan 6259's user avatar
3 votes
0 answers
1k views

Simulate folding paper using cloth modifier

New User here. I seem to be having issues getting the cloth modifier to simulate paper folding over itself. At a point the cloth becomes stiff and does fold at a given vertex. I would like the paper ...
Desmoid's user avatar
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139 views

How to access Normal and Tangential force values of objects during physics simulation?

I have a couple of soft body objects that collide with each other as shown below. My goal is to get information on the Normal and Tangential forces for the selected shape. I wonder, is it possible to ...
Amir's user avatar
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3 votes
1 answer
409 views

How to propel an object, rotating freely in zero gravity, towards a collision with a fixed plane?

I downloaded a model of an astronaut from the NASA website, and I'm trying to create an animation with it to import into a Premiere video project, but I'm just a beginner at Blender and am having some ...
street_taco's user avatar
3 votes
0 answers
474 views

Reload smoke cache from file

If I bake a smoke simulation, then then save-as the file as a new name, I lose the smoke cache. Is there any way to reload it?
Ascalon's user avatar
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3 votes
0 answers
297 views

Customized Force Fields - Modifying collosion options?

I am new to force fields in Blender. I was wondering if it is possible to define a new customized force field for rigid body simulations by scripting?
Benancio's user avatar
3 votes
0 answers
286 views

How to make cloth move by collision objects?

I am having a trouble when animating a wedding dress. For better simulation, I chose to make my wedding dress as a softy body instead of cloth. Then, to make my dress follow my character during ...
babox's user avatar
  • 161
3 votes
0 answers
5k views

Realistic aerodynamic simulation in Blender

Is it possible to use Blender to simulate realistic wind forces that take into account the aerodynamic properties of objects in the model? My use case: I modeled a windmill and want to use Blender to ...
Gwen's user avatar
  • 11.6k
3 votes
2 answers
2k views

Make a rotations-only parent BGE

There is a way to make an object parented to another object, but only for the rotations, not for the location. If i move the parent, the child may dont move. If i rotate the parent, the child must ...
Hack0re's user avatar
  • 298
3 votes
0 answers
675 views

Super Monkey Ball / Neverball level rotation system

Im making a sort of remake of Super Monkey Ball 2 (Gamecube) / Neverball (PC) is simillar too, but i have already encountred problems: In SMB (Super Monkey Ball 2) or Neverball, you dont move the ...
Hack0re's user avatar
  • 298
3 votes
0 answers
547 views

Making a object with soft and rigid body physics

I'm a bit stumped on how I can do something like this. I'm making a whip from Steven Universe and I want to know if I can somehow designate parts of the object as vertex groups that are rigid bodies, ...
Andy Wilkins's user avatar
3 votes
0 answers
103 views

Can one see static forces in Blender?

I have just started with Blender and normally I would dig into the manual first (so far I have done little more than do the ginger bread man tutorial). But this month I have to do an assignment for ...
Dirk's user avatar
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3 votes
0 answers
238 views

Is there a way to re-bake only the end part of an existing bake?

I'm trying to do some physics based animation, and of course the longer the animation gets, the longer it takes to bake. However, I don't need to keep recalculating the first parts of the animation, ...
gandalf3's user avatar
  • 157k
3 votes
0 answers
241 views

How would I simulate a jellyfish on the ground?

I want to simulate a squishy body like that of an jellyfish. The goal is to have one frame where it is at rest on the ground to render an image. The point of the simulation is to have it fold ...
Gunslinger's user avatar
  • 6,370
3 votes
1 answer
400 views

Cloth simulation bouces around when falling - does not settle

Thanks in advance! Version 2.82.6 I am trying to drop a bedspread on top of a bed. When I run the cloth sim, the bedspreads falls just a little then bounces/dances around and never reaches the ...
Jon's user avatar
  • 464
3 votes
2 answers
1k views

Is it possible to create a loop with Hair Dynamics?

I have a walk cycle of a character I created that uses hair strands with dynamics turned on. I was wondering if it was possible to make the hair dynamics loop along with the animation. Because as of ...
user avatar
2 votes
0 answers
44 views

Pinning Vertex group in cloth physics removes wrinkles

I created a bag of chips, added a cloth physics to it, and added pressure so it inflates. I had created a Vertex group at the top and bottom of the bag so I can pin it in the cloth physics properties. ...
Ogunlesi Taiwo's user avatar
2 votes
0 answers
42 views

How to create Cloth Simulation for Deflating a net wrapped around balloon in Blender?

I am trying to wrap a net (made out of torus shapes) around a balloon. As the balloon deflate, I hope to make the net get flat and flat (on the ground. I was exploring the inflate and deflate on ...
J13's user avatar
  • 55
2 votes
0 answers
164 views

How to simulate bendy antennas/sensors?

I want to simulate the antenna of an insect following the movement of its head, what would be the best way? I tried simulating using cloth and soft body sims, but its either folding too much or very ...
lafroehl's user avatar
2 votes
2 answers
2k views

Physics in Blender 3.3 Hair System?

I hear about all the great things about Blender's new hair system EXCEPT, for one thing, physics! Can you add hair dynamics?? I am currently working on my first animation clip and held out for this ...
Kiss Me Comix's user avatar
2 votes
0 answers
86 views

Making a shaking leaf ball character

Currently I am making a character which is a leaf ball. Everything looks great until I try to rotate it with armature. I use hair particles to create leaves and cover it on a sphere. When the sphere ...
SecretKitchen's user avatar
2 votes
0 answers
65 views

Why does the old collision still interact with other simulated object?

It's as the title says. I made some cheese react with my burger patty using the cloth simulation modifier. This works fine, but I wanted some tomatoes to fall on the cheese and eventually some lettuce ...
Zixen Vernon's user avatar

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