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Questions tagged [physics]

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

440 questions with no upvoted or accepted answers
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147 views

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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184 views

How can I make a silky, wispy smoke effect?

A while back, I asked a question about how to make an effect of blood in the water. No one answered, so I assume that the question was too specific. I've elected to delete that post in favour of a ...
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983 views

How can I make particles not pass through the surface and not get “stuck” in it?

I want to make the falling autumn leaves. I did a system of particles, but when the leaf particles reach the surface, (to which I applied collision modifier), they do not entirely remain on the ...
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448 views

Why is this happening when I bake physics to keyframes?

So, I'm trying to do some stuff with physics and cell-fracture, and I need motion blur. When I bake the physics and render w/ motion blur, the objets aren't in the scene. So I tried baking the physics ...
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98 views

Modelling ornamental grass procedurally

I am trying to model an ornamental grass procedurally (Miscanthus sinensis 'Gracillimus'). I want to be able to do this procedurally (not combing for example) because, unlike normal grass, it has a ...
3
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500 views

Simulate folding paper using cloth modifier

New User here. I seem to be having issues getting the cloth modifier to simulate paper folding over itself. At a point the cloth becomes stiff and does fold at a given vertex. I would like the paper ...
3
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0answers
82 views

How to access Normal and Tangential force values of objects during physics simulation?

I have a couple of soft body objects that collide with each other as shown below. My goal is to get information on the Normal and Tangential forces for the selected shape. I wonder, is it possible to ...
3
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0answers
351 views

Reload smoke cache from file

If I bake a smoke simulation, then then save-as the file as a new name, I lose the smoke cache. Is there any way to reload it?
3
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181 views

Customized Force Fields - Modifying collosion options?

I am new to force fields in Blender. I was wondering if it is possible to define a new customized force field for rigid body simulations by scripting?
3
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267 views

How to make cloth move by collision objects?

I am having a trouble when animating a wedding dress. For better simulation, I chose to make my wedding dress as a softy body instead of cloth. Then, to make my dress follow my character during ...
3
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2answers
537 views

Make a rotations-only parent BGE

There is a way to make an object parented to another object, but only for the rotations, not for the location. If i move the parent, the child may dont move. If i rotate the parent, the child must ...
3
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0answers
407 views

Super Monkey Ball / Neverball level rotation system

Im making a sort of remake of Super Monkey Ball 2 (Gamecube) / Neverball (PC) is simillar too, but i have already encountred problems: In SMB (Super Monkey Ball 2) or Neverball, you dont move the ...
3
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510 views

Making a object with soft and rigid body physics

I'm a bit stumped on how I can do something like this. I'm making a whip from Steven Universe and I want to know if I can somehow designate parts of the object as vertex groups that are rigid bodies, ...
3
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95 views

Can one see static forces in Blender?

I have just started with Blender and normally I would dig into the manual first (so far I have done little more than do the ginger bread man tutorial). But this month I have to do an assignment for ...
3
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0answers
134 views

Is there a way to re-bake only the end part of an existing bake?

I'm trying to do some physics based animation, and of course the longer the animation gets, the longer it takes to bake. However, I don't need to keep recalculating the first parts of the animation, ...
3
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0answers
201 views

How would I simulate a jellyfish on the ground?

I want to simulate a squishy body like that of an jellyfish. The goal is to have one frame where it is at rest on the ground to render an image. The point of the simulation is to have it fold ...
2
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0answers
29 views

Is it possible to do rigid body sims with periodic border conditions?

is there any native way or quick hack to get Blenders rigid body sim to use periodic border conditions, meaning that an object that leaves the domain to the left enters back in to the right, if it ...
2
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0answers
38 views

How to animate ribbon unfurling?

I have to animate ribbon unfurling an box opening. Like below. Got the box part down, but I'm stuck on the ribbon. What would be the best way of going around it the ribbon. Would it be best done with ...
2
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0answers
44 views

How could I create a sand dune animation?

I've been working on creating a whole bunch of nature animations and one that I've been trying to create is the "windy desert". Is there any way that I could simulate this in blender. To be more ...
2
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0answers
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 ...
2
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0answers
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
2
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0answers
47 views

geological visualisations in blender

I am looking for some assistance in creating some geologcial folding animation in blender. I have created a 3 layered version with 2 episodes of folding (the first set of pics) with a bit of ...
2
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1answer
118 views

Is there a way to simulate water balloon physics in Blender?

Trying to animate something in Blender and I thought I might try and give it water balloon physics. I don't know how to simulate these kinds of physics so I was wondering if anyone has any suggestions....
2
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0answers
139 views

Rigid body objects interact with armature bone?

Is it possible in Blender to create an object (human + armature), rig it and make it to interact with other rigid body objects?
2
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0answers
77 views

How to Create Shaving Foam in Blender 2.8

I really need to create a shaving foam shot for my final university short film, if anyone can help me with some professional techniques here are the storyboard images : Thanks in advance, Best ...
2
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1answer
51 views

Mechanical roller animation

I am making animations with rollers that move cubes. Here is a video I already made. I animated the cubes by hand... link to youtube video I am wondering it is possible to use physics to automate ...
2
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0answers
86 views

How to add “Sag” to cloth simulation?

I am trying to create the net of a soccer goal using blender's cloth simulator. Right now the net looks really rigid and unrealistic. The cloth is a plane with subdivision and a wireframe modifier. I ...
2
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0answers
163 views

Is it possible to realistically tie advanced knots with animation and physics in Blender? (I tried molecular script)

Initially, the task was looking pretty simple: Make a wooden sign tied with 2 ropes showily appearing on the screen and swinging on those noose knots. After 3 sec one of the knots come untied and sign ...
2
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0answers
104 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 ...
2
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0answers
36 views

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 ...
2
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0answers
152 views

Smoke/Liquid Ignoring collision object during simulation

I’m fairly new to Blender and modeling in general, and I’m running into trouble with running simulations (smoke, fire, liquid, etc). I’m trying to produce simulations to be used in a projection ...
2
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0answers
34 views

Weird dotted pattern in fluid simulation

I tried to simulate honey spilled from a bucket. The problem is that there is a dotted pattern on the simulation. What is causing this and how to fix it? The result: My settings:
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0answers
173 views

Rigid Bodies giving me hard time

I’m new to blender. Right now I’m working on a music video clip and I made these music notes (simple models) falling from the sky and hit the ground (simple plane). The notes are active rigid body and ...
2
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2answers
411 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 ...
2
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0answers
63 views

How does Blender decide random physics events?

I placed a cube over a plane and made both of them rigid bodies, and gave the cube a box shape under the rigid body options (the cube is active and the plane is passive). The bottom of the cube is ...
2
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0answers
45 views

How a make a button with physics?

I want to make a button and press it with a hand in blender with physics. I know I can do it with Keyframes in timeline, but I want to make a reusable button so I can create a lot of button which can ...
2
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0answers
49 views

Is it possible to establish some connection between materials with physics and physical properties?

One thing that bothers me a bit in Blender (or maybe in other similar frameworks) is it seems that materials and physics seem to be totally independent of each other, at least in Blender. However, in ...
2
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0answers
50 views

If I fix blender physics how do I get it committed to the official release?

If I fix blender physics how do I get it committed to the official release? Because for years now, it's been bothering me that blender physics is not accurate. Especially the particle physics. Next ...
2
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0answers
877 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 ...
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 ...
2
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1answer
196 views

How to propel an object, rotating freely in zero gravity, towards a collision with a fixed plane?

I downloaded a model of an astronaut from the NASA website, and I'm trying to create an animation with it to import into a Premiere video project, but I'm just a beginner at Blender and am having some ...
2
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0answers
1k views

Add more wrinkles to cloth

I have some problems getting the tablecloth to be the way it should. The issues I have are mainly tension and not enough wrinkles. Since the cloth doesn't have enough tension, the part marked with ...
2
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0answers
194 views

2.78c | Changing fluid gravity direction results in really weird behaviour

I have a rather simple fluid simulation. My gravity is at -9.81, and it works nice, but I have animated the gravity and when it changes from -0.001 to 0 or a value greater than 0 the simulation breaks ...
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). ...
2
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0answers
119 views

How to render particle (or in general physics) System in network renderer

I have a problem using the "network renderer" of Blender 3D. (Using blender 2.78b on every machine, clients, slaves and master) I have an explosion modifier on an object using particles which move a ...
2
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0answers
52 views

How to get the vertices coordinates of meshes for each step of the physics simulation?

I am running some physics simulations which involves a couple of mesh objects. I would like to get the vertices coordinates of one or two of the meshes in the scene while the physics simulation is ...
2
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0answers
50 views

Make a car drive perpendicular to normals on certain surfaces given certain conditionsin BGE

What I have in mind is to make a car I made (using the car physics, the one with the rigid body and non-solid wheels) be able to drive up steep surfaces and go around loops and corkscrews and other ...
2
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0answers
188 views

Is there a way to use 6DOF for spring in blender physics?

I wanted to make a bone with an angular spring for animation, But it seems there's only a spring joint constraint for length not rotation. (Generic Spring) But I found 6DOF for spring in game engine, ...
2
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0answers
235 views

Removing default gravity in “world”. Planetary gravity simulation

How to remove the gravity in scenes (or world) in Blend4Web? I already used m_phy.apply_force_world(obj, fx_world, fy_world, fz_world), and ...
2
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0answers
382 views

How do I fix hair collision on simulations

The selected mesh do have the particle system and the body is a physics collision. I think every one can see the problem