Blender Stack Exchange
Blender Stack Exchange

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.

Blender physics simulations allow you to simulate the interaction of bodies through collisions. Fluid simulations have specific objects called Effectors that provide the collision simulation in the fluid domain, while other physics simulations have collision settings.

This tag can be used for questions about any of the forms of collision in physics simulations.

481 questions
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What causes this weird collision?

Pretty sure that there is some answer to this already somewhere since it seems such a basic action. But I could not find an answer to it. Maybe since I just started with Blender, I just don't know the relevant keywords for it. I try to let some…
user007
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Detect two objects colliding, and write the frame number when collision happened

Yes, I know it is similar to this question, but I want further explanation. I would like to detect two objects colliding, and write the frame number if on that frame the collision happened. Collision itself can be detected using the method described…
dalbom
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Particle system and controlling the collision on surface on/off dependent on the emitting geometry?

I have three geometries, two point geometries emit particles in a line, like a laser beam, and the third is a plane. I could set the third, the mirror, to collide with the two particle streams. Now, I want to have that one of the two particles…
nolimits
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Blender: on/off collision modifier

I have a collision object with the fluid particle emitter inside. The idea is that when the fluid fills up the object, it explodes and all the particles falls out. The problem is that I can't find a way on how to animate the collision itself and…
Elina
2
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1 answer

How to hide collision shape lines in viewport?

I don't know what I'm missing, it should be totally simple and I found nothing about how to hide the collision shapes in viewport. (For some objects I chose a simple collision shape that doesn't necessarily fit the object shape)
audi02
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2
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How to make a hand armature hold an object, but with collision on the object; so the hand doesn’t go through the object?

Say I wanted my hand armature to hold a book, and I wanted to animate different poses of holding the book, but not have to worry about the fingers passing through the book; as though the book itself has a boundary. Therefore, the fingers would…
Champagne And Romaine
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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 to the plane to allow to wrap. Then I created…
NiceShoes
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Objects not touching in collision

I'm a total noob - and I'm doing a soft body simulation - just a ball bouncing. The ball does bounce, but it is not actually touching the collision surface, it is bouncing slightly above. It's like there's an invisible surface holding the ball…
JoeGideon
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Collision “Thickness Outer” and “Inner”

When you look at the Collision settings in Physics Properties, you’ll find Thickness Outer and Inner. I understand that Outer is an option to detect external objects like Cloth and SoftBody. However, I'm puzzled about the purpose of Inner. Since…
구원자
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1 answer

Problem with soft body collision animation

I'm new to Blender. How to make animation so that objects deform and interact with each other? I make a thread - collision, animate it and make a body - soft body, but it turns out not at all. The thread falls into the body. I did not find anything…
Vlad
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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 is the need of it? and should I do it for all…
Silver Soul
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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 colliders, so that when I export to a game engine I…
Aaron Franke
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Invisible wall in cycle

I have a basic cube mesh that i currently use as a wall And a basic ball mesh deforming itself on it as my animation How can make the cube invisible BUT keeping the interactions between the two objects as i render in cycles?
Mai Sasaki
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Collision dont work

The line goes through the hook instead of bypassing it. The line is made with a soft body. I added a collision to the hook. And in the soft body settings, I checked the self collision, but it still doesn't work in this case. When I make a straight…
Kogo
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How can I rotate and scale the collision cylinder, that it will fit perfectly on the wheel?

The cylinder collision should fit perfectly on wheel at x axis. Cylinder is supposed to be rotated and scaled, that it would fit to the edges of the wheel. Some people recommend me using Delta transform, but I don't know how to use it.
Garmes
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