Questions tagged [physics]

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

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Blender linked Rigid body constrains for fractures

The Rigid body bullet constraints was a good add-on to quickly set up inter object constrains for fractures or so. It works and still is for 2.7x but there's no way to do in 2.8x as I didn't consider ...
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2answers
34 views

Modify Boid collision distance with hard boundary - v2.80

Hello hello Blender community! This is the first question I'm posting, similar ones have been asked before but I was unable to get something working from the answers/comments on the questions most ...
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1answer
35 views

Hair glitch in cycles

So I my jumping model has dynamic hair, and with some time hair just start to extend quickly even though I don't have any growth set, it is some kind of a glitch. How can I fix this? I need just ...
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1answer
192 views

How to export physics data from Blender 2.80 now that BGE is gone?

The add-on I used ("blender-bullet-export") worked enough to export rigid bodies from the scene into a .bullet file, but it relies on BGE. Now that BGE is gone (for good) in Blender 2.80, what can we ...
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17 views

physics for a bag animation

I have an animation project in which someone drops stuff in the trunk of a car. Among these objects that are being dropped, are bags (sport bag, hand bag, backpack). So far, I used an empty as parent ...
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38 views

Fluid bake at 1024 quality?

I have been using Blender's fluid physics for a while now, and I have been wondering if it is actually possible to do a fluid bake at 1024 quality. What would this look like, and how could I achieve ...
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0answers
22 views

Can Ridged Bodies from Blender animation remain after animation loops in Unity?

I have created a keyframe animation in Blender for a pistol firing. The shell cases eject and at the apex of their ejection, a ridged body is applied that uses the trajectory to finish off the motion. ...
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1answer
29 views

Jittery physics trying to get a tube to roll in 2.8

I've subdivided and extruded, then copied, rotated and joined the base shape to create a grooved frame. The center of mass is the center of the frame. I've then added a cylinder to sit inside the ...
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16 views

I made a chain that has rigid body but the chain disconnects

This picture tells everything. They were supposed to be linked and they actually are but somehow magically disconnects through the mesh. It seems that it occurs when it happens when enough force is ...
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0answers
15 views

Physics Simulation. How to set current frame to first frame? [duplicate]

I need to do a simulation of bottles stacked in a bin in blender, as shown here. After 114 frames, I get the result I want, but I want to define this state as frame 1, how do I set it?
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2answers
25 views

How do I set a plane to not fall?

I've been trying to set up a physics simulation so I can drop an Ico mesh on top of a plane and then collide they collide. However, I can't get the plane to stay in place, it just starts falling down ...
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1answer
136 views

Translation and rotation axes not locked

I'm designing a 2D rigid body physics orthographic animation in Blender Game. It's simply a cube falling on and bouncing off a surface (first picture). The camera (in orthographic mode) is pointed ...
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0answers
14 views

how to assign different physics to different particle systems?

I'm trying to set up 2 different particle systems in my animation, one with "wind" blowing the particle system upward, one with a different particle system making a light streak. The wind blowing the ...
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13 views

(Blender 2.8) Smoke not showing in Physics Properties

The smoke physics is missing and I don't know how can I fix that. Thanks for helping me ! Here's the screen of the physics properties.
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0answers
19 views

Rigid body physics based pulley in blender?

Hi I want to make a simple physics based pulley with two rigid body objects, so that when the heavier object moves (via physics) it pulls the other object over the pulley. I don't need the 'rope' ...
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11 views

Glitchy Rigid Body Physics

When I move my object around it seems like the rigid body physics breaks their boundaries. Hi, I'm trying to go for a puppet style animation, similar to this video: https://vimeo.com/88599080 but ...
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10 views

How transform the emitted particles of a animation into a mesh? [duplicate]

I'm trying to save an specific frame of an animation of emitted particles: But I can't save all those balls as an object. It only saves the emitter. I is there a way to transform all these particles ...
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19 views

Issue with soft body physics - balloon string

I'm trying to implement what this answer is suggesting: softbody simulation, attached to another soft body, copy location constraint, I've followed those instructions. I need it to be a particle as ...
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0answers
20 views

Tricky Cloth Simulation with Cut

I try to create a cloth simulation where at some point the cloth is cut along the edges. I am in 2.83 where there is a Weld Modifier now which just applies the "Merge by Distance" operation on the ...
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2answers
844 views

BGE: Can a rigged rigid body interact with BGE physics?

BGE: Can a rigged rigid body interact with BGE physics? Basically, I want to know if it is possible to have a mesh that is animated by an armature interact with the BGE physics, including other ...
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0answers
17 views

Softbody flying through air & deforming (without colliding)

This is my first post. I'm making a simple animation (letter acting jiggly/wobbly, while flying through the air). You can see the result I want inside my old flash game here (intro, letters flying ...
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1answer
87 views

Why isn't the frame animation not changing its animation?

I've just rendered an animation about a intro, and it seems likes it's on the same thing and it Isn't changing. I'm on frame 21 it just shows the same animation over and over again. Here's is a ...
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2answers
78 views

What is the easiest way to simulate trampoline?

I've been fiddling with physics for about three hours now, I'm trying to create a trampoline physics scenario, or a stretched cloth with a pinned diameter catching a falling object. My falling ...
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0answers
35 views

How would you make a Diving Board?

I would like to bend an object by hitting it with another object but I don't want the first object to just fling about after getting hit. I would like to know how to "pin" and object, say a long board,...
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1answer
93 views

Can you put Multiple physics simulations in one scene simultaneously?

Trying to add multiple smoke simulations running at the same time in 2.8. but only one will render at a time
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2answers
414 views

How to remove unlinked/disconnected parts of a bigger mesh?

I have many meshes like the one shown below which have some faces/vertices that are not connected to the main mesh. I use these meshes for physics simulation. As result of these weird parts of the ...
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1answer
68 views

How to push apart rididbody objects to avoid intersection?

I saw this image on Grayscale Gorilla and I know how to do this stuff in Cinema 4D. But I have problems to recreate it in Blender. What is the best way to clone objects to a volume and push them ...
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1answer
56 views

Fire simulation not working in eevee 2.81

I'm trying to make a fire simulation for an animation I'm making, but when I bake the simulation I get a strange result. It works completely fine in cycles,but I want to use eevee because it's a lot ...
2
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1answer
3k views

Cloth Simulation : Self collision results in cloth “exploding”

I'm trying to model a cotton garment by simulating it's draping process. I'm having issues only when I enable self-collision of the cloth. Without self-collision , there are no issues but I do need ...
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2answers
730 views

Soft body sticking to concision object

So I have been trying to make a soft body animation but they keep sticking to the box they fall in. I've tried as much as I could think of and haven't seen much about this topic online. I feel like it'...
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0answers
9 views

Point Constraints Breaking When I Append Them

I made a simple ragdoll using point constraints but when I try to append it from my main library file to another file, none of the joints work and the ragdoll just falls apart. This is the ragdoll in ...
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0answers
23 views

How to add I more wrinkles in my cloth simulation? While having it behave and face where there is tension?

blender noob here. I’m practicing with blender right now and I’m trying to make a cloth simulation where it gets blown in the wind. I noticed when doing the animation, it lacks the detail(wrinkles) ...
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0answers
881 views

Passive rigid body physics not working

I have a pipe wherein I have set the physics property as passive. I have a cube inside the pipe. Physics property of cube is also set as active. But when i tun the animation, instead of cube moving ...
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1answer
1k views

Passive rigid body physics not working with screw modifier

I'm making a rolling ball animation where the ball will roll around a set of pipes, planes and other objects. I created a spring using the screw modifier and then made a second slightly smaller spring ...
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0answers
19 views

Hair Sticking Simulation

I have a hair particle system. I would like the hairs to be attracted to a nearby mesh based on its proximity, not unlike how human hair reacts to a statically charged balloon. This would be ...
4
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1answer
71 views

Documentation on the mathematical models used by Blender physics engines

I need to know which mathematical models Blender uses during rigid body simulation and fluid simulation (e.g. Lattice Boltzmann). Is there something like that in the Blender manual or do I need to ...
2
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1answer
312 views

How to change a force field's strength by triggers when animating?

How I can automatically change force field strength by triggers? I working on animation where a car (rigid body) moves on the track. I need increase speed on few places (like speed zones in games). ...
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1answer
30 views

Physics object with force field render oddly shaped and jagged

This question still puzzles me: When f-12-rendering (both Cycles and Eevee) frames with a cloth animation the banner-object behind the airplane appears oddly shaped and utterly jagged. Please inspect ...
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1answer
35 views

Physics: Liquid Splashes too much

I have a problem with physics. I am trying to make a spoon removing a fluid in a cauldron. The problem is when I introduce the spoon into the liquid the liquid splashes a lot. I tried changing a lot ...
2
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1answer
142 views

how to generate more “gusts” of wind with the wind force field?

the noise amount is on max but i'm still not able to get the quick short random bursts of wind i'm looking for. is there a way to increase this amount or a better way of achieving this?
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2answers
97 views

How can I get physics objects to for a tight container?

Now in Blender Game Engine in 2.79, and previously in other components, I've frequently encountered situations where a seemingly closed container still lets other physics objects through. For example, ...
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1answer
40 views

Animated cloth simulation parenting troubles

I have parented both banner (with a simulation), airplane and camera, but cannot make them travel in sync. The flag/banner is making me troubles: The objects appear connected when moved in 3d-view, ...
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1answer
62 views

Problem with Fluids Tespassing Obstacles (bottles, cauldrons)

I have problems with physics. I modeled a bottle and I duplicated part of the bottle for the liquid. The liquid has a face on top so it is closed. The bottle is open on top. I added a cube for the ...
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1answer
60 views

ReBake a fluid Simulation?

Following problem: I have a fluid animation which works after being baked. Now I change some detail, the inflow velocity or the inflow type for example, but when I hit the bake button again the ...
2
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1answer
240 views

Fluid simulation and animation

https://www.instagram.com/p/Ba0fhHGAXxn/?taken-by=dkpatel25 As seen in above video I made the man using "control" property from Fluid simulation. How can I make the man walk or animate in any kind ...
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1answer
780 views

Fluid is not generated

Following few videos on youtube, I try to create a very simple fluid animation: Creating a cube for domain Creating a circle and change Fill Type to Triangle fan. Placing circle inside the cube In ...
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1answer
31 views

Dynamic paint Displace not rendering

I have been trying for the past couple of hours to render an animation with dynamic paint displace, but while it works in the viewport, it does not show up in the render. These are a few things I have ...
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1answer
178 views

Rigid Body, object passing through floor

So typical rigid body simulation problem, object is passing through the floor. I am trying to set leaves to rigid bodies so when the character steps on them or pushes them they react. I have the ...
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1answer
25 views

Understanding rigid body physics

I'm following this great tutorial https://www.youtube.com/watch?v=1gM8yEMFMjg to learn how to fill a mesh with a particle system but am having trouble replicating the simulation (at 6 min 50 sec if ...
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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 ...