Questions tagged [collision]

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How do I use collision models on my exported meshes?

I have a project that I'm working on using the Hammer Engine (a remake of a map which requires specific external models). For this project I have exported many psk meshes from a specific game's files ...
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1answer
34 views

Clothes don't collide to its parent : a rigid body

Description of my scene : I have a human face mesh (an alembic file in movement) and ropes made with single vert and whith cloths properties parenting to my face (as child) When my face moves, ropes ...
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Smoke collision not working in blender 2.83! [closed]

Smoke collision not working in blender 2.83, in blender 2.79 it was working fine
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Why are my rigid body objects sometimes passing through this surface?

I am designing a dice rolling device that holds three dice in a dome shaped object, but having issues with the dice colliding with the dome. All three dice have the same rigid body settings, however ...
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2answers
22 views

How to make 2 objects not intersect each other?

I have made an animated rigid body active character and the ground is passive rigid body. But the character's feet passes the ground that I don't want to happen.I want to move character so I don't ...
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Wind Force Field stops at frame 33

I`m pretty new to blender and i have now 2 issues with which i could need some help. I want to animate an old welder torch welding a railway section (simple) and i added a wind force field behind the ...
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21 views

FLIP fluid simulation does not detect collisions anymore

Sorry for such question, but someone is getting dumber by the second (me or blender): fluid collision stopped working completely (worked before by some miracle) Domain is set, fluid set as Geometry, ...
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34 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 ...
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1answer
28 views

Why doesn't my effector work like I want it to with the new Mantaflow (Blender 2.82)?

I want the plane highlighted in the picture to work as kind of a surface for the water simulation to run through, but when I go ahead and simulate it, it just goes through the object like if it was ...
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20 views

Particles reappear at emitter after dying

I am trying to animate a cascading device where particles are emitted from a rectangular plate in order to hit a bent plate which kills the particles. The particles are killed just fine upon collision ...
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1answer
29 views

Is there a way to remove all colliders at once?

I have a large scene made in Blender, where many of the objects have mesh colliders. However, mesh colliders are a bit inefficient compared to using primitives. I would like to get rid of all mesh ...
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22 views

Cloth Simulation Refuses to Settle

I'm trying to bake a clothing simulation for my character animation, but the shirt geometry continues to move infinitely. I've tried multiple setting combinations, but the mesh refuses to settle. I've ...
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1answer
51 views

Why the cloth penetrates collision object?

I made a person and set cloth simulation to cloth. At first, simulation worked well, but after set running animation, it became not so good. As you can see, the cloth penetrates body object that I set ...
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1answer
22 views

Explosion before collision

I've got a free falling box on blender 2.82 which fractured 100 pieces before. It explodes before touching the ground plane. What can be causing this. Ground plane is passive rigid body.Box is ...
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1answer
28 views

Feathered wing - how to keep feathers from colliding with eachother?

I am a brand new Blender user, but loving it. I am jumping in with my first project, to build and rig a properly functioning feathered raptor dinosaur. I've hit a roadblock trying to rig and ...
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1answer
44 views

Leaf Particles falling through plane

So I have a plane and leaf which I used as a hair particle. But the leaf is passing through the plane. What should I do? Enabling or disabling rotation doesn't change anything. These are the leaves ...
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1answer
46 views

Fire collision object

I am working in EEVEE and I set up a fire simulation. I am trying to figure out though, is there a way to have my fire wrap around an object? I need it to collide with what is above it and wrap around ...
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2answers
62 views

Particles are not killed when video is rendered

I have 2 images (as planes) and a particle emmitter in between. When previewing, no particle come through the image as in this screenshot: Link When rendering the video, the particles do come through ...
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1answer
34 views

Why does this piece of cloth collapse if I enable 'cloth collision'?

I want the one piece to simulate as cloth, but it doesn't work. If I don't check the "cloth collision", it works correctly. But if I check it, the one piece collapses. I already tried to change some ...
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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, ...
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20 views

How can I prevent my collision objects from intersecting?

I'm trying to simulate an elastic beam draped over the edge of a box. I'm close, but the beam penetrates the corner of the box (see photo). The beam is a NurbsPath softbody and the box and floor are ...
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20 views

Emitter+collisions+molecular addon 2.8

My goal is to fill a cup with objects. I prefer using an emitter because it's easier to change quantity and more. I read that with molecular addon 2.8 you can achieve this by preserving collisions ...
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Low poly long coat cloth simulation

I made this model of a girl who's wearing a long coat. I want the lower part of the coat to have cloth physics. I understand how to make it simulate cloth, I know how to attach it to the rest of the ...
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40 views

Understanding what “dependency cycle” means, why it happens, and if it is a cause of concern [MWE provided with cloth]

I am using Blender 2.82a. My code seems to be working but creates "Dependency Cycle" messages from the command line, so I hope to understand why they are happening and if they are a cause of concern. ...
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22 views

How to move a dense mesh irregular object above other object surface in a especific direction?

Hello I m new in Blender and I ve trying to solve the next problem for a long time but I couldn t find an appropite solution. So I m writing to you and maybe you can help me. My problem is the ...
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15 views

Rigid Body Simulation colliding spheres intersect

I am trying to create a random packed bed (cylinder filled with spheres). For the cylinder I added it from the add mesh option and deleted the top face and added some thickness using solidify modifier;...
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26 views

How can I reduce the friction of Mantaflow colliding with effectors?

Just experimenting with liquids in Blender (I’ve only just got into doing fluid sims). Finished this tutorial and did some experiments of my own with collision effectors, such as some whiskey dropping ...
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1answer
85 views

Why does my Mantaflow waterwheel not work?

Apologies if this doesn't light correctly, I omitted the HDRI I was using to save space for upload and download of the .blend. Plug in your HDRI of choice and the scene should look fine (or turn off ...
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12 views

How can you make something both stiff and flexible at the same time?

I'm using cloth physics because soft-body is too slow to be usable. What I am trying to test is just a single blade of grass and a cube. I don't know exactly how collision works so I enabled ...
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How can I make specific vertices attracted to each other while doing a collision simulation (specifically cloth)?

I would like for the specific vertices of an object to gradually connect when I start a cloth simulation, similar to the way that you can "sew" edges of cloth planes together in dedicated cloth ...
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7 views

Internal Smoke Collision v2.8

I am trying to constrain some smoke in an object, but the smoke collision settings changed in v2.8, and the documentation hasn't been updated. Does anyone know how to do internal collisions? I'm ...
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15 views

Pressurized cloth object don't collide with another soft body

I'm trying to simulate an automatic tourniquet mechanism that can obstruct the blood flow when expanded fully due to inside pressure. I pinned the cloth to the outer ring and keyframed the pressure ...
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1answer
15 views

Collision Objects losing their effect

I have a scene where I have a flag blowing, and a box with a collision modifier on it. Everything is working fine, but every time i disable the collision object from the view port, they lose their ...
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10 views

Initial velicity not working if objects a close to each other, how fix that?

I need to make colliding streams of water, it will be fluid rainbow with 7 colors, but i've faced the problem((( As you can see if objects are staying separate, initial velocity working werry well, ...
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Why does my cloth simulation object not return to its original shape after colliding with an object?

I'm relatively new to Blender and currently I'm working on Blender 2.82 and trying to do a basketball animation. But I've faced a problem and couldn't solve it for days even after following tutorials ...
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93 views

How can I make Mantaflow smoke fill a collision shape?

I'm trying to achieve the effect found in this question and it's attached .blend file - however, with Mantaflow (I assume), the answer no longer works. I'd like to be able to fill a text object (...
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15 views

Spooky behavior when baking rigid body to keyframe

I have a simple animation of a wrecking ball hitting some cubes, before baking the rigid body into keyframes everything looks great, but when I do so, after the collision, some of the cubes that ...
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19 views

Collision issues in render

Sup, kinda new to the collision, I want them to collide just like in my preview but when I render they just fall through. Is there anything I need to do to avoid them not colliding in the render? I'...
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20 views

Only few hair affected by collision body in Blender 2.8

So im making a mouth model and y have this tooth brush, but when i see it in Eevee render, only few "hairs" seem to be affected by the collision body. this are my settings in Hair Dynamics Also, the ...
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7 views

Broken wall pieces aren't falling after I added collision on base plane , before it was passive and then i added collision

Everything was ok my base plane was passive and the wall which was meant to break was working properly until I added Collision on Base Plane so that particles falling from wall can interact with it ...
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20 views

Fluid simulation goes through object

I'm trying to simulate a fluid in blender with a cup, but all the while it goes through it. If someone knows how to solve it, I would appreciate it if you could explain it to me. I'm sorry for my ...
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17 views

Copying collision properties from an active object in Blender 2.82

I want to copy collision physics from one object to the others (Object->Rigid Body->Copy from active doesn't work for me). I know that I should select the ...
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17 views

How to prevent the rigging hair pass through the body, object or mesh while animated?

Greeting... I never find this problem solution for 2 years... can some one help me? Please? or blender dont have way to do this?... HERE THE FILE :
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15 views

Cloth Simulation

I don't understand why my towel when it falls in some places passes through the plate. I already enabled the collision on my plate and table. What have I done wrong?
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10 views

How to make the bone or armeture not pass trough the mesh or object?

I want to animated this bone with mesh and i'm using jiggle plugin, i want my bone have Collision and to make it not pass trough the cube and the sphere.. how to make it? thank you
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1answer
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Beginner question: Collision is not working

I'm a total beginner and just finished the famous donut tutorial. Now I've started with my first own project and facing a problem that I cannot solve. I modeled a light bulb and would like to fill ...
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Some particles go straight through collision objects

As the title says, some particles don't seem to be effected by an object with collision enabled on it at all. I found a couple threads on this, but they were all really old, and the things suggested ...
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45 views

Particles collide properly in preview but not render

I’m trying to have some particles his a collision object and then slide off. What’s confusing is that the previews and even the F12 renders work and then when I go to render the animation, the ...
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Rigged Cloth, Collision not working

I have created three cloths using bones and none of them will collide. Self Collide is on and the torso part does have collision physic enabled and I have played around with the sliders to no avail. ...
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210 views

How to make particles stick to mesh when Molecular Script is enabled?

I’m trying to make particles stick to a mesh and stay on it even if it moves. Setting Friction=1 seems to do the trick unless the Molecular Script is enabled. I also tried setting Stickiness=10, but ...

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