Questions tagged [physics]

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

643 questions with no upvoted or accepted answers
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4
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61 views

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 ...
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139 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 ...
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1k views

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 ...
4
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0answers
522 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 ...
3
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1answer
89 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 ...
3
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0answers
131 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 ...
3
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1answer
366 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....
3
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0answers
868 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 ...
3
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0answers
91 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 ...
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2answers
1k views

How to remove unlinked/disconnected parts of a bigger mesh?

I have many meshes like the one shown below which have some faces/vertices that are not connected to the main mesh. I use these meshes for physics simulation. As result of these weird parts of the ...
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0answers
64 views

Is it possible to establish some connection between materials with physics and physical properties?

One thing that bothers me a bit in Blender (or maybe in other similar frameworks) is it seems that materials and physics seem to be totally independent of each other, at least in Blender. However, in ...
3
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1answer
285 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 ...
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383 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?
3
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0answers
218 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?
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0answers
270 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 ...
3
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0answers
3k 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 ...
3
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2answers
818 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 ...
3
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0answers
500 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 ...
3
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0answers
525 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, ...
3
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0answers
97 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 ...
3
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0answers
143 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, ...
3
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0answers
212 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 ...
2
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0answers
38 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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0answers
23 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 ...
2
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0answers
19 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 ...
2
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1answer
65 views

How to make a particle simulation like this?

So here is the reference https://www.instagram.com/p/CHijzp2gVt7/ I don't ask for like exact guideline how to make it, but if you can throw me a few steps or tutorials for something specific as this. ...
2
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0answers
32 views

Objects with rigidbody physics slowly vibrate/rotate (Blender v 2.9)

I am trying to animate a simple scene in which apples fall from above into a bowl. I added rigidbody physics to the bowl, made it passive, set the collision to mesh, and set the margin to 0.01. I ...
2
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0answers
22 views

How to get my two objects move natural (trebuchet)?

so I've been working on two types of trebuchet. Following youtube tutorials got me this far: 1 trebuchet is working with a spoon at the end, but the launching object keep falling of even before it ...
2
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1answer
27 views

Texture Based Collision

I'm looking to add collisions to a surface which simulate the rough surface of a wall. Since subdividing for a displacement modifier would be a little too taxing on my computer, I was wondering if ...
2
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0answers
29 views

Morphing/contracting under physical force

I'm a biologist and I work on cell deformations under stress. I am new to Blender. As a part of my project, I want to animate/simulate cells deforming under contraction force. I want to morph/contract ...
2
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0answers
68 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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0answers
39 views

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 ...
2
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0answers
20 views

How do I make a teleporter for rigidbodies?

Is there a way to make a rigidbody move to pointA when it touches pointB? I'm sorry if this is a really dumb question but it would help a lot.
2
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0answers
53 views

What would be the simplest way to create a vertical or horizontal cell fracture / realistic wood break?

I want to create a piece of cracking wood in blender for a project of mine, I made a blender-guru esque ball n' chain destruction setup, made a simple cell fracture wall, put a wood material on it, ...
2
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0answers
88 views

Blender - Vector Field Animation

I am trying to create an animation of a vector field for my university Physics project. I ideally would like to create something like this https://www.youtube.com/watch?v=gcQuqxYU-UY so with moving ...
2
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0answers
38 views

What metric unit does the force field use?

What unit does the blender physics 'Force Field' use, e.g: The 'Strength' in 'Force' ? I'm using the metric(The answer doesn't have to include only metric) preset.
2
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1answer
103 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 ...
2
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0answers
35 views

Is it possible to do rigid body sims with periodic border conditions?

is there any native way or quick hack to get Blenders rigid body sim to use periodic border conditions, meaning that an object that leaves the domain to the left enters back in to the right, if it ...
2
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0answers
60 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 ...
2
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0answers
326 views

How could I create a sand dune animation?

I've been working on creating a whole bunch of nature animations and one that I've been trying to create is the "windy desert". Is there any way that I could simulate this in blender. To be more ...
2
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0answers
58 views

How to hook a rope?

I'm trying to attach some tin cans to a car to create a concept of "just married". I'm confused to apply physic on it. When turning on "soft body" for rope (curve). Hooks I set are not working. And ...
2
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0answers
390 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 ...
2
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0answers
302 views

Inflatable object creation

I want to make my text looks like an inflatable object, I have seen much artworks like that but it's mostly on C4D, was wondering is there a way to make something like that in blender. thank you
2
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0answers
159 views

geological visualisations in blender

I am looking for some assistance in creating some geologcial folding animation in blender. I have created a 3 layered version with 2 episodes of folding (the first set of pics) with a bit of ...
2
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3answers
788 views

Physics in blender 2.8 - can't interact with objects while simulation is running

Do this in both blender 2.8 and 2.79: Create cube, enable rigid body physics, set to active, run animation, drag and release cube. In blender 2.79 cube will act like a real life object, that is, it'...
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0answers
226 views

Rigid body objects interact with armature bone?

Is it possible in Blender to create an object (human + armature), rig it and make it to interact with other rigid body objects?
2
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0answers
126 views

How to Create Shaving Foam in Blender 2.8

I really need to create a shaving foam shot for my final university short film, if anyone can help me with some professional techniques here are the storyboard images : Thanks in advance, Best ...
2
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1answer
80 views

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 ...
2
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0answers
149 views

How to add “Sag” to cloth simulation?

I am trying to create the net of a soccer goal using blender's cloth simulator. Right now the net looks really rigid and unrealistic. The cloth is a plane with subdivision and a wireframe modifier. I ...
2
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0answers
341 views

Is it possible to realistically tie advanced knots with animation and physics in Blender? (I tried molecular script)

Initially, the task was looking pretty simple: Make a wooden sign tied with 2 ropes showily appearing on the screen and swinging on those noose knots. After 3 sec one of the knots come untied and sign ...

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