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Questions tagged [physics]

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

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48 views

How to bend parts of mesh with a force field?

I'd like to make feathers on a tail of a model bend to the force fields. I've tried some tutorials but after spending whole day trying different methods, none of them worked propely. For example in ...
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1answer
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My trees are being blown too fast and my grass is not affected by my wind physics after a few seconds

So I did a massive mistake with my tree and grass, and did not target this problem before rendering. The leaves on my tree are being blown too rigorously, and my grass stops being blown after 2~3 ...
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51 views

Mesh Deformer Modifier - Low poly mesh with softbody simulation deforming a high poly mesh

Is it possible in Blender to optimise the softbody simulation by using a low poly mesh for the simulation to deform a high poly mesh? Instead of simulating the high poly mesh itself which would take ...
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Need help getting objects to fall through one object but collid with another in blender 2.79

I am trying to make a sphere with an extruded stick on the bottom fall through a circle with two extruded sticks but when I use the rigid body feature they go all over the place instead of falling ...
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23 views

Physics tab: no fluid options 2.8

I selected the domain object of my fluid, I already baked once and now want to make changes and bake again but no options are there. I already tried restoring the cashe_fluid data, the baked mesh ...
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12 views

How to make a mesh undestructable? [duplicate]

I am a noob and was following this tutorial. But no matter what I change the mass of torus to, it always breaks. Is there a way to make a mesh undestructable.
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34 views

How realistic is the physics engine?

I've been working on making a bowling animation where a character throws a bowling ball and it hits bowling pins (obviously). I showed brother my WIP and he said the only thing he didn't like about it ...
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34 views

How to control physics simulation?

I wanted to do a bowling animation purely because it'll allow me to learn a lot about controlling physics and rigid bodies. So far I have a animation set up where a character throws a bowling ball and ...
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49 views

Weird cloth behavior: why does my cloth diverge on collision?

Earlier I've animated simple collision with a cloth-modifier. (I've compressed it to a 2MB mp4, but I don't know how to upload it). It shows a face moving along a path through a (pinned) cloth, so ...
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26 views

Particles hit mesh in rendered static frame but go through same frame when rendered as animation

I have particles falling down from an emitter; they are supposed to hit the floor (plane mesh) and pile up there. This works perfectly in the viewport and when I render just a single frame but when I ...
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20 views

Objects location data after location keyframe

I have created a scene where a cube and a sphere collide with each other. The collision takes place in the 20th frame and on the 12th frame I have turned off the kinematic properties of both the cube ...
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Collision Modifier Stops Rigid Body Simulation

I was following Blender Guru's tutorial here and I had made it all the way to the particles when I added the collision modifiers. When I went to play the simulation to see if the modifier was working,...
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13 views

How can i use an imported collada file, as a soft body

I'm currently trying to make a photo scans of a guy get hit by a car in blender, but I can't get the car or the guy to work as soft bodies. This is what blender shows me under the physics tab: Both ...
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27 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 ...
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14 views

Physics Attribute Node

Can the attribute node have an attribute that measures the force put on a surface? I'd like to attach this to the displacement output as a different way around fluid simulation, that hopefully ...
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28 views

How do you break parts off a model during animation?

I'm posting this away from my workstation, so unfortunately I don't have any pics. I think I can describe what I'm trying to achieve though, so I'm gonna ask: I've got this character I'm working on ...
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37 views

Two moving bodies collision

What is the right way to create two moving bodies collision by script? Since both of the objects been animated they collapse into each other when colliding. How can I prevent this from happening? ...
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131 views

Pin a Rigid Body Object

I am trying to find a way to make a Rigid Object object swing from a given point (an Empty or anything else) without being deformed. For example: In this example I want to make the Cone swing on the ...
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18 views

How to create two bodies collision

I want to create two bodies collision. The two bodies are been animated in order to determine their start and finish positions. The problem is that the two bodies collapse into each other instead of ...
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1answer
32 views

Is it possible to make physics respond to the effective mesh after a displacement material has been applied?

So let's say I have a procedurally heightmapped plane (texture -> displacement -> material output) and use the Cycles-exclusive "Bump and displacement" option. Is it possible to have rigid body ...
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20 views

Looking to get smoke emitter to collide with itself?

I am trying to make condensation mist appear on a glass bottle when the smoke appears it tens to just fall right through bottle and go through it. I want the smoke to be bouncing and rolling down the ...
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Should I Add A Cloth Simulation To This Model?

So i made this Hoodie for this character and I'm wondering if there is any way i could maybe make everything else, but the zipper, act like a cloth simulation? or maybe i could use a soft body ...
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26 views

How to create a ball that is able to jump using physics not animation?

I learned how to make a bouncing ball using soft body physics. Visually, I can use part of the ball movements so that it looks like as if the ball is a living creature that is able to jump. Of ...
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49 views

Softbody + Rigid body = nightmare?

I've been experimenting to see if a Roger Kilimanjaro style render loop is possible in Blender. From my efforts so far I've learned that mixing Soft Body and Rigid Body simulations poses some ...
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1answer
37 views

How to get cloth + wind simulation in 2.80?

I tried the regular flow of: Creating a plane Scaling to ~0.5mX0.5m, applying scaling Subdividing by 10 cuts Creating a vertex group out of one of the edges for pinning Apply cloth simulation, use ...
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2answers
32 views

How can I get particles (confettis) to fall on a sphere, follow its surface without penetrating it and fall off when reaching the “equator”?

I've set up the sphere as Collision with Stickiness 10 and Friction 1.0. When falling on the sphere the confettis follow its surface but stay horizontal, which means they penetrate the surface of the ...
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1answer
36 views

The shadows on Eevee are clippy? [duplicate]

I don't know the proper term, but I'm a new blender user and I was trying to create a light and the shadows from it are very clipped, but only on Eevee. Works fine on cycles.
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15 views

smoke is more dominate on left side of mesh

I'm making a logo for my new water cooled pc company "Dark Aura" and I'm wanting an aura effect around the text. It is dominating the left side and I can't seem to figure out why. Any ideas? thx, -...
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1answer
52 views

Cloth simulation - simulate 2 unlinked meshes together as one

Gentlemen, I have a problem with the cloth simulation. The object I am simulating consists of 2 or more parts that are not interconnected. As a result, the simulation treats them as two separate ...
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17 views

Cloth simulation ripping mesh

In 2.79Blender-Internal,I have been trying to simulate the path of a rigid body on a cloth like surface.However,the cloth(cube) gets ripped when the rigid body(sphere) comes in contact with it. ...
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22 views

Negative Mass for Rigid Bodies

I'm trying to create rigid body balloons in Blender, but I can't figure out a way to make them work. I've tried using multiple rigid body world groups, but that doesn't work the way intended. I know ...
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2answers
1k views

Diffraction of a wave passing through double slits

I am trying to create an animation of a wave propagating and passing through a double slit to undergo diffraction. The effect is something similar to the image attached: I have played with the wave ...
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1answer
71 views

How to make objects not pass through each other?

I have a field with plants, and some plant's leaves are cross over with each other. How do I add collision/or is there any other way to solve this problem? I need that effect, cause I'm creating a ...
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1answer
1k views

Copy Physics to multiple objects in Blender 2.8

I'm trying to convert a number of objects to have 'Rigid Body' Physics at the same time rather than having to do it one by one. I know in 2.79 you could use the left hand toolbar to select "add ...
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41 views

Blender 2.8 - How can rigid bodies be moved after physics simulation?

So I tried to follow this tutorial because I want to make myself a gold texture. After I have done the physics simulation I realized, I cannot move or duplicate the coins in any way. They snap back to ...
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36 views

Scatter without overlapping instances

I am looking for something like neatscatter https://neatscatter.com/ Is something like this possible in blender? Thx
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1answer
212 views

How to create wire between objects

I have the following: It contains two cube-like shapes, two sockets and a wire running between them (the curved one). The wire uses an array modifier and follows a nurbsPath. This is extremely ...
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49 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 ...
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1answer
62 views

Animating Gravity in BGE (2.79)

I'm looking to try and implement a feature in my game where a keyboard press sensor would reverse the gravity of the scene to -9.8 any ideas on how I could do this? I tried playing around with force ...
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1answer
78 views

physics : blow sheets of paper with wind?

I need to create an animated shot where sheets of paper would be blown away by some (directional) wind, like you would do with leaves : I'm hesitating between animating it by hand (using curve ...
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22 views

Object disappears during physics bake

So I'm blending a golf-ball using rigid body physics superimposed over a panning drone shot over a golf-course. The motion-blur isn't rendering that well, so I'm trying to see if baking the rigid-...
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103 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
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1answer
22 views

Decimated parts falling into each other

I created a plane, subdivided and decimated it. After that I edge split the plane to create multiple triangle. To give them a 3rd dimension solidify was used. When I now want to animate the triangles ...
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1answer
36 views

When I Link Some Modifiers From One Object To Another It Dosen't Copy All of Them

I have two physics modifiers. One is a Soft Body the second one is a Collision. When I do Ctrl+L and link the modifiers it doesn't copy the Collision and if the Collision modifier is already there it ...
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26 views

Physics - curve rope colliding with object intersect problem problem

My goal is to create a rope that falls onto a cylinder object and the ground. I created a path which I subdivided and set the bevel property as an object (4 circles) which I twisted around to create a ...
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2answers
51 views

Keyed particles work on viewport but not in render, also they are not affected by force fields

When making a particle system with keyed physics, it works in viewport but the particles do not show properly in the final render. They reappear from the world center when all the previous particles ...
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1answer
632 views

(Blender 2.8 Stable) Smoke Domain renders as cube in EEVEE

I imagine this has come up before, and I am happy to have this question deleted (if I cannot do so myself): When rendering smoke in EEVEE, the domain renders, rather than just the smoke. My steps for ...
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1answer
27 views

Can a custom optimization code be added for doing accurate mesh deformation simulation in Blender?

I am interested in doing a crash test on a motorcycle using my own optimization code. I typically use engineering software such as ANSYS do perform CAE. I would like to know if Blender is equipped ...
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85 views

Particles won't collide with object?

I have a particle system in 2.8 that emits metaballs, and Ive added Collision to the object I want to collide with. Settings on the collision have friction at 1. Ive followed tutorials, however my ...
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17 views

Adding Physics to Object Made of Multiple Curves

I have created a coin from an Illustrator file. I imported it as .svg and have extruded all of the separate curves that make it up. If I added a Rigid Constraints to all of them, they would probably ...