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Questions tagged [physics]

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

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Is it possible to make forces act on the objects surfaces instead of the object center?

I want to create an explosion where I need to give the planks some radial velocity based on the point force. The planks are just moving away from the force based on the center point of the mesh. Is ...
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It¡s possible to make mesh collide on another mesh without the “collision” physics?

I have made clothes for a character, i've already attached them to the armature and im able to move it, but the body mesh overlaps with the clothes mesh. I know that with a little of hard work, i can ...
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1answer
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Problem with a simple physic simulation using python scripting

I am very new at blender and I want to make a simple simulation in blender. I used boolean operation to model the bowl-like shape. And I dropped the cube into the bowl. When I play the simulation via ...
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1answer
18 views

How do I make objects collide with text?

I'm a beginner in Blender, and I'm making an animation where an animated piece of text collides with balls in its path, causing them to roll. I was just wondering if there was some way to tackle this ...
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Blender 2.8 Smoke Sim Bug

Recently, I started using 2.8 for smoke simulation. Everything looks normal until I render it out. Though I can preview the smoke in the viewport(render mode), it does not appear in the final render(...
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Can linked objects with physics constraints interact with other objects?

(Newbie to list: 1st post. Hello everyone) Specific question: How to make linked objects with physics constraints interact with newly created objects. I am trying to use Blender2.8 to animate ...
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Limit bone animation velocity

I'm currently animating a robot arm. For this purpose, I created an armature with IK solver. I've constraint the bone (aka robot joint) transform to match the motion possible with the robot. However, ...
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22 views

Rigid Body Doesn't Interact

I'm creating a simulation of the 9/11 tragedy. However, the rigid body for both building and the plane don't seem to work at all. Plus, the plane itself is rotating every time I add rigid body to it. ...
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1answer
39 views

Simulating an egg on a conveyor belt getting smashed

I have a short animation of an egg shape (solid w/o liquid) and the egg is on a conveyor belt (follows directional movement of belt via driver) then was supposed to have the egg get smashed by a large ...
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19 views

Can we add dynamic hair particles to a softbody simulation?

I am modeling a winter Cap, The model looks like this I am trying to apply softbody physics to the fur ball on the top of the cap. The physics act properly on the ball but the hair particles don't ...
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how to soft deform multiple spheres into a base shape [duplicate]

i'm trying to recreate this effect: (Credits to Joey Camacho, https://shop.rawandrendered.com/collections/prints/products/in-formation ) I tired to use multiple soft body sheres falling into a cube, ...
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Cloth Simulation Rips my mesh

When I use the cloth simulation and try to make an animation with it, the mesh is ripped into many layers and pieces for some reason... Any idea why this is happening? Thanks Blend File:
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1answer
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Legos falling into place and stacking up. Can someone point me in the right direction?

I am making an animation to be projected onto a wall at a theater. I need to make legos fall from the top of the screen and land stacking up to form a wall. After that I will have the Legos movie logo ...
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1answer
42 views

How to link two different physics objects together?

I am trying to make a winter hat model which has cloth simulation on it. The model : This is not the final model but this should give you the dea Is there any way to make the fur parts heavier than ...
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1answer
48 views

Create a Hanging Bucket Effect (Handle Hooked on Rod)

I'm trying to create a hanging bucket effect, where the handle hooks on a rod and when the bucket falls, the handle stays hooked. I've tried almost every combination of Active, Passive and Active (...
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1answer
35 views

BGE car game problem

I have model two car.the first car is okay but the second car is flying when I turn right or left. here is the blend file many thanks for any answers.
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3answers
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How to convert physics animation to a curve/path?

Ok. I have a ball at the very top and a long curved tube leading down and I want to turn the ball's physics animation into a follow path animation. In order to do that I need to somehow make a path ...
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0answers
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Stretch traffy around a corner

To learn more about Blender Physics, I've developed a scenario that encompasses what I want to be able to achieve. GOAL Something like rubbery taffy is stretched out from a post, around a sharp ...
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1answer
32 views

Fluid simulation leaking through obstacle

In this project, water is leaking from the walls of the waterwheel and it doesn't look realistic at all. I tried so many possibilities but nothing worked. please help me to make the water looks ...
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0answers
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Fluid Obstacle while animated by modifier

I'm new to 3D animation, and was trying out Blender. I've come across an issue that I'm not sure how to fix. I wanted to try throwing fluid onto a subdivided plane, whose vertex's are being moved by ...
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33 views

How can I use physics connect functions in Blender 2.8?

I've been taking tutorials of Blender at the age of 2.79(we still live in this age basically), and I am pretty used to the physics tool bar functions in 2.79, you can create physical constraints ...
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0answers
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How to have multiple objects use physics at different times within same animation?

So essentially I got a lot of different rock models and a scene where buildings fall throughout the entire animation. The only problem is I don't know how to set a time for when those rocks should ...
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2answers
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Experiment with Polystyrol Balls

I'm writting my Thesis about a method for an additive manufacturing method for thinks like styrofoam aka EPS. Now I want to simulate the light distrubution in small balls of Polystyrol hit by a ...
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Trying to make two softbody spheres be connected

I'm not entirely sure what I am asking for but I do know there probably is a term for it, if anyone knows the answer or could tell me what I am looking for that'd be great. See, I want to take two ...
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1answer
188 views

Why won't blender 2.8 bake more than 250 frames?

I have changed the cache, and also extended the frames length. Here is a Video that shows the problem. It is recorded after baking the animation. Here is the video. to me it seems like a bug because ...
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0answers
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Rotor spinning by hydropower

I am trying to figure out how to spin a rotor by using the force of water. Now I am not coming to a good result or even close... Please explain how to make a rotor spin by the force of the water ...
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1answer
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Blender 2.79 physics and simulation

I want to create a simulation where there is a core and at these core objects are attracted to it gradually till they form the shape of the core e.g Sphere core like Chibaku Tensei. How can I achieve ...
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1answer
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How to make an (open) object behave like rubber when penetrated by another

So uh i've got this problem with a penetrating object and another object that serves as something like a condom if you will So what I want, is for the penetrating object to not deform while moving ...
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How do you avoid dependency cycle between two soft bodies?

How do you setup two softbodies with collisions without getting a dependency cycle ? A depends on B through Softbody Collision B depends on A through Softbody Collision Those two objects interact ...
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0answers
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How to make 3D objects the children of hair strands?

I saw this inspirational thread Access hair child strands (animation nodes) From there, an idea suddenly popped into my head — how about making grass leaves the children of hair strands. Is that ...
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0answers
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Interactive Phsics Modelling

I would like to re-phrase and narrow a question about physics animation while modelling. This question below was aksed, and it's similar to the question I am asking. Is it possible to interactively ...
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1answer
23 views

Why is smoke getting caught my my container

I tried to set up a thing where smoke (being emitted by a small circle) was coming out of cylinder that I inserted and extruded to make a cup. For some reason, the smoke would not rise until I moved ...
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0answers
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Car Collision Problems With Ground

TL/DR: Collisions at edge of convex hull give physics errors I have a very simple rigid body car in Game Engine, and when going over triangle mesh it seems to bounce where Blender decides to cut the ...
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0answers
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Chain Links Snapping Apart

I'm trying to create a chain that is connected to a ball on one end and a board on the other end. The ball is used to pull the chain with (like something to grab onto instead of just holding the end ...
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Physics Collision Problems

I´m totally new to Blender and to this web and i hope I can learn a lot here. I´m having trouble with the physics collision of rigid bodies. Already watched and tried 5 videotuts and read a lot here, ...
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0answers
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Curly hair animated

So, looking on this research paper ( http://graphics.pixar.com/library/CurlyHairB/paper.pdf ) I wasn't able to recreate even the starting point on the trouble that Pixar had simulating hair. In ...
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0answers
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How do I make an object detect a soft body actor in BGE

I’ve been working on a game in blender game engine in which you knock cubes out of a tank, but you can only do that with soft body physics and so when I try to make the fallen cubes count as points it ...
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1answer
156 views

2.80 Eevee: Rigid body collisions OK in Viewport, but none in Render?

just wanted to ask if the behavior mentioned in the subject is a known problem in the current 2.8 alpha? Or am I doing something wrong? I have a simple test scene, it is basically a keva planks tower,...
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1answer
39 views

icosphere passes through all planes even with collision on in physics tab

See animation below: Red ball passes through everything. Blue ball passes through both stairs and green plane but finally collides with blue plane. I have been trying to fix this problem for 4 ...
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How can I realize “sticky” collision, i.e. that objects connect as soon as they touch?

I'm fairly new to Blender (great piece of software btw), so please bare with me. I'd like to have multiple spheres (up to 50), which move randomly in space and as soon as two spheres collide they ...
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3answers
109 views

Blender fluid simulation “with drag” (simulating a pump)

I need to do a fluid simulation, where the fluid goes through a pump. The pump-model is build the way, that the intake is at the bottom and the output is at the top. I need a way to get the fluid all ...
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0answers
56 views

The second emitter does not emit particles in the correct way

I'm trying to create a traffic simulation using the blender particle systems with different model of cars. The enviroment consists of a two-lane road. I want the cars crossing the two lanes in ...
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1answer
26 views

Ridged body no physics

I have a static object that flys through the air that needed collision. So i changed it to a ridged body but it still has physics and wont fly anymore. Is there a way to have a ridged body with ...
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2answers
116 views

How to make an object appear and disappear repeatedly in a certain area?

I am animating an atom and I don't want to use a Bohr model so I am trying to make radials. For this, I need to define a boundary, and then have an electron (shown as a sphere) to appear and disappear ...
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Make solidifed mesh follow the mesh in front of it

So basically I did a cloak for a character I'm working on. I solidifed them, so that they don't look like planes. But when rigging it is creating weird deforms, sticking through itself and is totally ...
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1answer
51 views

Cannot run simulation for smoke and fluid

I've been trying to render smoke and fluid simulations, but can't manage to get the results I'm seeking. The first problem is that the smoke and fluid don't simulate. The second problem is that the ...
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0answers
22 views

How to move more objects in a coordinated manner with the particle system

Hello to every blender user. I'm trying to configure the particle system because I want that it generates a certain number of cars that should follow a curve. I have different types of cars. Here's ...
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1answer
34 views

Fluid simulation sticking through mesh

I'm having an issue with my fluid simulations. I'm a beginner, so I might be missing something obvious. I'm trying to fill up a cup with water, but the liquid is behaving very strangely (see below). ...
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1answer
44 views

Changing Physics of Waving Flag in Python

I have created a Blend file of a flag waving in the wind. This is done using a Wind Field and the Cloth physics attribute added to the flag mesh. The animation renders nicely in the Blender API using ...
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How do I get rigid body activation to propagate through a set of rigid bodies?

I have around 3K LEGO bricks tied together and I made them all rigid bodies (active RB). Is there a way to control the way they "activate" and start the simulation? For example, if those bricks are ...