Questions tagged [collision]

Blender has several physics simulations that support collisions, such as fluid and rigid body. Use this tag for questions about collisions in physics simulations.

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247 views

How to make a cloth simulation reach its resting neutral shape faster after it is disrupted?

I am trying to learn more about cloth and collision simulations. I built a plane with a subdivision and cloth modifier, pinned it's top edge, then had an impermeable cube animate upwards to "...
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16 views

How to simulate a rolled/folded/bunched up window curtain dropping down?

Goal I am trying to simulate the effect of a window curtain dropping down from a bunched/rolled/folded up position. There are three ways a curtain can held up. It can be rolled up, folded up, or just ...
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1answer
27 views

Make Ball bounce around in a cube infinitely

I am trying to make a soft body ball bounce infinitely off of all the walls within a cube. Unfortunately I have not had any success with this. Everything loses momentum and stops, even with all ...
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1answer
10 views

Fluid simulation particles are offset from the effectors

Every time I simulate a fluid simulation in blender it always 'hovers' above the desired collision. I've tried applying the scale, I've also tried to set the normals to a smaller size but still no ...
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1answer
28 views

what is the purpose of collision

Hello I just want to know what is a collision exactly? the word means clash or two objects got hit together ( this is the meaninng I got in google translate when translated it to my language). What ...
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1answer
26 views

Pulley on stationary axle

I'm new to blender, and for some reason it appears that no one has ever made a simple pulley (at least I couldn't find any forums or videos on it). I need a very simple pulley on a stationary axle. ...
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7 views

Disruption of Size Deflect when using Metaball in a particle system

I created a particle system inside, placed the Emitter in an X-type MESH and assigned it the Collision property. But when the metabolites become larger, they fly out of the Collision object
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1answer
17 views

Smoke won't collide with my mesh

here's an image: Smoke won't collide with my mesh, instead it goes through it. As you can see, my mesh has been given an Effector type: collision. What's the issue here?
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2answers
91 views

Delay freefall of a cloth mesh

I got a single object made of multiple cubes with a cloth modifier applied. My goal is to delay freefall for every cube so for an example: Green cube freefall will start at 30th frame. Pink cube ...
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2answers
83 views

Cloth modifier doesn't collide properly

There are 4 identical cubes with the same specs - cloth and collision modifiers. The problem is that during the collision the green cube is not affected by the blue one at all. On the left side: green ...
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1answer
34 views

How do you make a new collider?

I'm currently working on an obstacle course for some soft-body balls to go through, and I'm right now stuck on creating a funnel. I'm trying to make the balls go through the funnel, but there's ...
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1answer
27 views

How to make Juddery Simulation of Falling Leaves smooth?

I am using a particle system and a force field to simulate falling leaves. The leaves are falling from the sky and are supposed to stay on the ground. I encounter two problems here: The falling ...
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1answer
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Deactivate collision between certain Rigidbody objects?

I have a model consisting of many seperate objects that are all overlapping with each other and I want to use Force Fields to "destroy" the model. How can I stop collisions between the ...
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1answer
31 views

Particle system collision with itself and other objects

I'm trying to make a scene where some particles shoot up from a phone and then land on the table the phone is on, i can make them shoot up and bounce off the table well but when they land they seem to ...
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1answer
48 views

How do make soft-body balls go through a hole?

I'm currently working on a tutorial for a soft-body obstacle course, and I want the balls to go down into a funnel. However, when they land on it, they get stick to it, when I want them to roll down ...
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1answer
41 views

cloth sim refuses to respond to any and all collision objects

Here is the blend file: https://drive.google.com/file/d/1EvQ3yYtWmFcM7evke1OW3uL0aInsn0rM/view?usp=sharing I have tried everything, everything to stop my cloth sim wire from clipping through this ...
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21 views

Adding physics property to mesh doesn't do anything?

I have an existing animation via "how to use blender" tutorial from Blender Guru (Donut 3.0). I'm trying to now go beyond and do my own thing but I can't seem to figure out why I can't get ...
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14 views

Blender Cloth Physics - Limit Object Collisions to several collections

is it possible to limit the object collision of a cloth to more than one collection. I can only select one collection. Thanks!
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cleaning up glitched complex overlapping mesh architecture

I am relatively new to Blender (Rhino for now) and tried to collide multiple 3d photogrammetry models. In the end, I glitched it my resizing the meshes to create an unexpected architectural model. The ...
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1answer
31 views

How can I give wind and turbulence effects only to the inside of the cube object?

There is the cube-A, which is covered with a cloth, and another cube-B is placed on the top of it. I want the paper object to fly by wind and turbulence only inside cube-B without any effect on the ...
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1answer
61 views

Dragging towel across floor using cloth simulation

I'm attempting to have character model using a rag to clean floor and having the cloth attached to hand but dragging across the floor, the floor being the collision. I would only want cloth attached ...
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1answer
28 views

Particles Have Ugly Dynamic Painting

I am rather new to 3D animation and Blender and am following this tutorial. https://youtu.be/0koL5NGBaA0. The goal is to animate halfway realistic rain sliding down a window. So far it has been well ...
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2answers
57 views

What's wrong with Blender physics simulator?

I am trying to make a physics simulation where particles are moving inside the box like an ideal gas. However, there is a problem with the simulator. I set bounciness for the ball and the box to be 1, ...
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26 views

Layers of clothing for character models?

I've been messing around with the sewing tool recently and I'm wondering how you add more layers of clothing over each other (specifically on character models). The cloth simulation doesn't seem to be ...
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32 views

How can I fix my chain while adding collision?

I am adding a chain to my model and I am trying to get the chain to collide with the skirt of the model, just so it sits on top but still moves around a bit. So far, I have the chain moving when I ...
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1answer
41 views

How can I stop the cloth sim from going through the mesh?

I know this is a common question, but I looked through literally every single forum and I couldn´t fix it. I tried bumping the collision quality to 200, reducing and bringing up the collision distance,...
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2answers
82 views

Why am I seeing ridges on a cloth simulation?

I'm new to blender and have been playing round with a simple cloth and collision animation made from a simple UV sphere and plane. I added a subdivision to the sphere to smooth it out and subdivisions ...
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29 views

What is happening to my cloth simulation? It explodes for some reason

I am trying to make a walk cycle, and the mesh I am using has a side skirt. I wanted to make that skirt react to the leg movement,so when my mesh moves her leg, the skirt reacts to it. Yet for some ...
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14 views

Particles changing color/material when colliding with an object [duplicate]

I want for the particles to change color when colliding with an object. Exactly what happens in this video: https://youtu.be/Uvlin_zw03M
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24 views

Colliding hair system with canvas for dynamic paint

I am getting decent with the UI, but still a blender noob. Trying to make a working paintbrush for an animation. I want the hair to collide properly with the canvas and look like brush hair. And no ...
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0answers
21 views

creating a barrel, smoke + fire creeping through barrel

I am doing a test. I've got a hollow cylinder mesh that's supposed to represent a cannon barrel, and I have managed to get an emitter firing particles out of this cylinder. The cylinder constrains the ...
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1answer
58 views

The problem of cloth objects penetrating each other

I've been having this problem for a while. I've asked about the same problem here before, and I've taken your advice into account, but it hasn't solved the problem. I have tried to adjust the model to ...
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27 views

Cloth Simulation and Object Collision

I’m relatively new to Blender, probably been fiddling around with it for a couple of months now, working things out as I go and reading/watching tutorials for what I need. Anyway, this little project ...
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32 views

How can I prevent colliding Cloth Objects from wrinkling each other?

I am trying to create a model of paper being blown by wind using a model with a Cloth Modifier and a Force Field of wind. However, when I play them in animation, the Cloth objects that collide with ...
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1answer
62 views

The problem of simple cloth objects penetrating each other

There are multiple cloth objects which are raised by two different force fields. Both cloth objects are physics-based, and the object collision of those cloth is 0.02m. I have a problem with them ...
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0answers
30 views

How do I make plants interact with the environment?

Vague, I know, but what I'm essentially trying to crack is: You know how if you have a plant on a desk against a wall or a bush that grows enough that the leaves start pushing against walls and other ...
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24 views

How do I get collisions to function when using mantaflow fluid simulations?

I need help getting collisions to work in this fluid simulation. I tried increasing the resolution 256 in the domain settings. I tried increasing the subdivisions of the first collision object that ...
2
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1answer
127 views

Trebuchet Rigid Body

Greetings dear 3D artists! According to a tutorial on "Wintermute Digital" YouTube channel called "Blender 2.8 Physics Tutorial - Make a Working Trebuchet!" I created a trebuchet ...
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0answers
18 views

Cloth simulation render issue (mesh breaks every 20 frames of the simulation)

I am currently experiencing this annoying cycles render issue where every 20 or so frames in my 3120 frame cloth simulation, these weird streaks appear on my mesh: Below arre my physics and modifiers ...
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24 views

Replicate skin movement in rendering

Hi i’m trying to replicate skin being repeatedly targeted, similar to this part of the video (0:03 to 0:10) https://www.youtube.com/watch?v=0XYbo1YGo0c I have a full body model i’ve already rigged, ...
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1answer
43 views

Cloth simulation strange behaviour

I thought of creating a napkin for a scene and started with a plane subdividing it to 40. Its a simple plane with no materials, textures or modifiers. I applied the cloth modifiers from the physics ...
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1answer
86 views

creating a hanging hose with soft body

I want to make a hanging hose similar to this image. I have been spending a day to find a way to archive a real rolled up hose effect. Please help guys first I made the holder (not similar to the ...
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1answer
30 views

Cloth sewing problem with rigged 3d-model

I have a 3D-human model with initial pose like this: I want to rig it then change it to T-pose, by following the YouTube tutorial here. After I change it to T-pose as below: Then I added a cloth ...
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1answer
56 views

How to make 2 cubes with 'child of' faces crash, lose cube parent, and faces spray around and drop on the floor [duplicate]

it seems i have to re-ask my question.. delete parent halfway animation, keep position and more i have two cubes flying around, they are rigid bodies and have cube faces that are 'child of'. When the ...
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1answer
58 views

How to animate an explosion in a certain direction? Why is my shatter going in the opposite direction?

Problem Hi. I animated a ball going through a window. The window shatters in the direction the ball comes from, but I expect it to shatter the direction the ball is going to. In ...
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Why are cloth and collision simulations slowing downing down the animation when they are disabled?

After deleting 4 clothes with show in viewport turned off, the frame rate doubled. Also after removing a disabled collision modifier, the frame rate increased by a frame per second. This doesn't make ...
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27 views

Why is Cloth simulation crashing through object on one but not the other?

No matter what I try, the cloth simulation always crashes through the model on the left (see image), but not on the right. The Torus is SDx2 and scale applied and I've used the same settings on the ...
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1answer
33 views

Liquid Stabilisation?

After recently starting liquid simulation, I wanted to know how to stabilise the liquid after it is poured into another object(collision object eg. cup). No matter how many extra frames I give it, ...
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21 views

How to shoot Rays from all 4 corners of Camera

My task is to detect how better a 3d model fits the camera view. The model is always located at he center, while the camera can be placed anywhere. The model should not be outside the view of camera. ...
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16 views

How can I reveal intersections in my mesh?

I have a design similar to tank tracks. Some of the clearances are pretty low and I want to make sure that there are no collisions. Are there any tools to reveal colliding points.. where two separate ...

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