Questions tagged [physics]

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

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How to make softbody interact with an animated rigid body

I am trying to make a scene where a softbody cube falls into a long spinning rectangular rigid mesh, but it turns out that both doesn't interact with each other as the cube just falls through and ...
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2 votes
1 answer
142 views

How can I make this launch better?

I tried to launch this pawn away with some rigid body physics, but it just slides off and doesn't look very convincing in terms of speed and the overall movement. I like the way the square flips up ...
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1 vote
1 answer
27 views

Blender cloth sinking into basket

I'm trying to model a low poly picnic basket, and I want to put a cloth into it like this (so the cloth goes into the middle): When I use default cloth settings I get this: what settings/techniques ...
1 vote
1 answer
18 views

How to use cloth sim for flat surface?

I'm trying to put a picnic blanket sort of thing onto a flat surface. When I do this, the cloth doesn't crumple or move (I'm guessing because there is nothing to bend it?, but I want to get a more ...
1 vote
1 answer
20 views

Fluid Simulation - fluid quantity

I am working with Fluid Simulation, and I am struggling with some of the settings. I read through the manual on blender.org but I haven't found a solution for this. I am trying to add fluid in a "...
0 votes
1 answer
27 views

How do you give physics to an object after an animation?

I'm new to blender. So I was trying to make a simple animation of a cube with physics on it, then I decided to animate the cube to go up in the air and release it to do physics stuff. So the question ...
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0 votes
0 answers
10 views

Rigid body not rotating when bouncing off another rigid body and keeps bouncing off the floor forever

So, I am making an animation where a cat is dancing and I want a rigidbody (roll of paper) to fall in the background, but whenever I run the animation, the paper falls and then doesn't rotate, and ...
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2 votes
1 answer
48 views

Stretch cloth to a limit then tear

I was wondering if there is a way to make cloth stretch to an extent and then tear. For example: have cobwebs(cloth) sticking between an object and wall then, the object starts moving so the cobwebs ...
  • 134
1 vote
0 answers
26 views

Best solution for particle collision simulation

Hello everybody, I am working on recreating the model you can see in the picture. The model is wearing a "helmet" cover in leaves. Although the 3d model will not be moving, I want the leaves ...
1 vote
0 answers
23 views

Fluid simulation into keyframes?

I'm trying to play fluid simulation in reverse in a dope sheet. I've baked the simulation cache, but the option to bake it into key frames does not exist, it does only for rigid body simulations. I've ...
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2 votes
1 answer
39 views

Cloth sim shirt gets stuck and unstable on characters under arms

My cloth sim shirt keeps getting stuck under my character's arm pit like this: https://imgur.com/QF51yjT Since the cloth is constantly stuck there it won't settle and the shirt won't stop vibrating. ...
0 votes
0 answers
19 views

Is my soft body mesh flawed for soft body physics?

I want the "Pachi Shell" to behave like a semi-rigid plushi. I've spent several hours tweaking stiffness, push/pull, self collision, etc, but I can't get the results I want before it the ...
1 vote
0 answers
22 views

How do I prevent my smoke simulation from getting smaller with more resolution divisions?

Whenever I increase the resolution divisions, the smoke always becomes smaller. I want more resolution without shrinking its size.
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4 votes
2 answers
736 views

How come my cloth simulation is clipping with itself when using armature despite having self collisions enabled?

I am trying to create baggy clothes and using Cloth Simulation, but seem to be having a problem with self collisions. Despite having enabled Self Collisions for my shirt simulation, the shirt still ...
2 votes
1 answer
59 views

How to make a chain look like it's hanging naturally?

I made a single chainlink then used an Array Modifier to duplicate with object offset linked to rotated "plain axes" object to rotate alternating links. I made a single link to be the anchor ...
0 votes
0 answers
14 views

Need help with complex hair collisions

I´m working on a short film that involves a character who at one point puts a mask on (not a full head mask, it covers just his face), and no matter what I try his hair goes through the mask when he ...
0 votes
1 answer
34 views

Why does my cloth shirt sim inflate

I have this shirt: which should just fall onto my character when I hit play. But instead it inflates like this: I have all collisions and self collisions set to the minimum but it doesnt seem to ...
0 votes
0 answers
25 views

Tanks suspension physics

I am modeling a tank in blender with the aim to use it in unreal engine later (first project ever in blender). I am currently trying to apply the physics to my suspension. I have added an active rigid ...
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0 votes
0 answers
11 views

Soft body object not falling

I have been working on a project for uni for a while now, I made a scene with a couple objects and some textures. It's going to be a ball falling from stairs, bouncing on collision. I made the ball a ...
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1 vote
0 answers
24 views

Is it possible to affect a cloth simulation with fluid simulation?

I am trying to simulate fluid on top of baked cloth simulation. It is even possible? I have got a baked cloth sim with a FLIP Fluid physics sets to obstacle and a sphere set as fluid that drops on top ...
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0 votes
0 answers
20 views

Softbody to only deform on collision?

I have a softbody which should bounce and deform when hit, so I give it some weight painting at the points which should deform the most. The problem is that, the softbody will deform a little ...
  • 107
0 votes
1 answer
21 views

How do I make the physics more natural?

Don't ask why but this is a cube shaped egg. The egg is cracking and something is popping out. No matter how I play with the mass, force and deleting bakes and rebaking, it doesn't change what it's ...
-1 votes
1 answer
18 views

Animated collision not colliding with soft body

I have a soft body object and a collision object, both are animated. When the collision object collides with the softbody during the animation, nothing happens. However, if I remove the animation from ...
  • 107
1 vote
1 answer
39 views

How to automate the orientation process for a 3D Model such that it has maximum alignment with Global Z axis?

I have a scan of a banana-like object. For the time being, let's assume I'm importing the STL file of a 3D-scanned Banana, which is bulbous on one side (is heavier on that side). It gets imported into ...
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0 votes
0 answers
9 views

Rigid body does not work with my pulley animation

I have been working on a pulley animation and I want all of the meshes not to go through each other. I have enabled cloth physics for the rope. Even though I have enabled the rigid body physics, the ...
0 votes
0 answers
15 views

Limit rotation of rigidbody?

I've been working on a drumset and I'm facing some trouble with the cymbals as I want them to move dynamically if hit. I tried setting them up as active rigidbodies and the joists as passive ...
0 votes
0 answers
46 views

How To Bake Particles Into Mesh w/ Keyframes?

I have a particle emitter that drops a single particle, which is manipulated by forces. I've got it working perfectly, however, it is too fast and I want to slow it down. But I don't want to slow ...
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1 vote
1 answer
37 views

How To Freeze Frame On A Falling Leaf (Dynamics & Forces)?

I want to create a shot where a fallen leaf ends up in front of the camera, freezes there for a few seconds, and then resumes its fall. I'm trying to do this with physics and forces, but I can't get ...
  • 1,017
0 votes
0 answers
9 views

Blender to Unity (collisions)

I'm wondering how to import objects into Unity without it colliding as a block with the car. Hoping to make a racetrack that is interactable in Unreal Engine 5. Is this possible or am I short on ...
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0 votes
0 answers
12 views

Why Won't Rigid Body Spin In Vortex?

I'm at a loss here. My Vortex force will only affect the translation of this object, but not the spin. What am I missing? PROJECT FILE
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0 votes
0 answers
17 views

Cloth object (flag) starts to dissolve during render

I have a flag like this: But after rendering the animation, it starts to dissolve and moves weirdly around, and ends up looking like this: I suspected RAM issues during render, however, I didn't have ...
  • 3
0 votes
0 answers
22 views

How can I set a specific linear velocity in the x-y direction for a sphere using Python?

I am trying to set a specific linear velocity for a sphere in the x-y direction using Python in Blender. I have already assigned various properties to the sphere using the bpy library, such as ...
0 votes
0 answers
22 views

Rigid body on edited plane not working

I have a cube on simple plane. I applied rigid body on both objects active and passive. Everything is working fine . But now if i edit plane and extrude one of the edge and now play animation, then ...
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4 votes
0 answers
95 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: ...
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3 votes
1 answer
113 views

Plane falls not on collision surface

I follow through my first Blender lesson and have a problem. Tissue falls as if current point of view is collision surface, not table. I did set up Collison property on table and saucer and also set ...
  • 31
0 votes
0 answers
28 views

Fluid particles keep flowing back on curve Force field

My goal is to have fluid particles pour into a cup and disappear inside. I kept experimenting with multiple settings but the closest solution gave me the result shown below. The main issue is those ...
0 votes
2 answers
37 views

Plastic Ocean avoid IOR distortion, but keep the look

I am recreating a model of the ocean in a stylized way. I am satisfied with the " ocean " look, but I need to place Wind Turbines, and, as expected, I get distortions proper to the IOR ...
2 votes
2 answers
48 views

How can I make light particles (like feathers) explode then fall down slowly?

i'm trying to make an animation where a characters head appears suddently in a pile of hay. The straw particles should almost explode on the top of the pile, then gently fall down. I've tested using ...
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0 votes
0 answers
25 views

Some hair particles are stiff with dynamics

so I'm currently trying to work on hair dynamics for my rig and I keep running into this problem but don't know how to fix it. I have my rig bending to the left to see how the hair falls and most of ...
0 votes
0 answers
19 views

Particle system different than render

I am using cycles to render out a cold sparks clip for NYE. I have rendered out one clip and it will pass as usable but i want to make it look more realistic. So, I added about 25000 particles, I ...
3 votes
0 answers
37 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 "...
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0 votes
0 answers
53 views

Error activating the Molecular addon in Blender 3.0

I just started doing the particle exercises and for that, I need to use the Molecular addon. I use Blender 3.0. I downloaded the addon and installed it. The problem appears when I want it to activate ...
0 votes
0 answers
22 views

How can I apply the 'unit scale' of my scene to get it back to 1

I recently had to change the unit scale of my scene after I realized everything was off scale (started the project from an imported interior scene at the wrong scale) and it had a repercussion on some ...
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3 votes
1 answer
162 views

How do I extract a mesh from just one frame of a physics simulation?

If I simulate 50 boxes falling onto a plane using physics rigid body, how do I get a mesh from just one of those frames? I want all 50 boxes as they have landed, joined together as 1 object that I can ...
0 votes
0 answers
25 views

Move vertices while maintaining face size?

Imagine you have a model for a bag of chips, but the bag is flat. Let’s say you fill the bag with chips, so to model this, you’d want to adjust and pull out points on the bag. Is there a way to move ...
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2 votes
1 answer
49 views

My rigid body simulation was working fine until yesterday, and it now will not bake at all

For the last four months I've been making an animated movie as a school project. In one scene I had a bunch of transistors move out of the way of something that was falling using a rigid body sim, but ...
2 votes
1 answer
87 views

How do I copy a keyframe for settings across multiple objects?

I can change the physics properties of all the objects in my scene at the same time, by selecting them all then hitting ALT when I make changes in the Physics properties. Or I can copy the values of ...
1 vote
1 answer
35 views

Why can't I stop these objects from falling down?

I have two sets of objects that I want to fall apart at different times. I used the "cell fracture" addon to divide them up. The FIGHT set works great. I set all the parts to "...
1 vote
1 answer
32 views

Cannot stop intersection on money as particle system

I'm making a simulation of a load of money flowing and piling up. I have a plane that they're sat on and another plane they're running into on the left, both with high friction to stop them and make ...
0 votes
1 answer
37 views

Cannot get physics to work properly, everything goes mental

The pivot is set to rigid body passive. The see-saw is set to rigid body active. The block is placed on the end of the see-saw and is set to rigid body active. I used the snapping to faces to place ...

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