Questions tagged [force-fields]

Force fields can be used to add effect to many of Blender's physics systems (Such as wind to blow particles and cloth, turbulence to smoke, etc.)

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16
votes
3answers
6k views

How to simulate magnetism In Blender?

Is there a way to create magnetism in Blender? Using the physics engine or the game engine, I want to create BuckyBalls (the magnetic toys) within Blender.
12
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1answer
3k views

How do you make a cluster of cubes explode?

How can you make a bunch of objects explode? I don't mean fracture, I just mean shoot off in random directions. I want to know how to do this for a rigid body simulation. So how can this be ...
11
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1answer
1k views

Apply force along normals of cloth mesh

I'm trying to simulate an inflatable mesh by applying a force field to a cloth. As air pressure always acts perpendicular to a surface it might be a close enough approximation when pushing all ...
9
votes
3answers
6k views

Seamless looping animation

I'm trying to create an animate gif of a boat where there's no discontinuity between the end and the beginning. To do this, I need the sails and flags of the boat to return to approximately their ...
9
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1answer
2k views

wind / pressure inside a volume?

with blender's simulation system, is it possible to simulate s.th. like an airdancer, a party horn, or the blowing up of a balloon? is there a way to create a force field that – when placed inside an ...
9
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1answer
1k views

"Time remap" or slow speed of cloth particles driven by a force

I have a scene with a particle system, which emits a few planes, to which is assign a cloth simulation. A wind point force emitter drives the particles in a swirl. Cool. The overall action is ...
8
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2answers
653 views

How can I make string tighten around a soft object

I've used blender for a couple months, my knowledge is limited to basic modelling. I'm trying to get the effect of string being tied around a soft object. Like this string around my finger. Not sure ...
8
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1answer
602 views

Magnetic Spheres

I would like create a simple animation; Two spheres at a given distance each with a magnetic moment such that they are attractive. i.e. that when you simulate/animate, the spheres should come together,...
7
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2answers
2k views

Pulling a net tight

I am trying to drape a net using the cloth physics, but then is there a good way to make it look like the four corners are pulled and "staked" in a certain place? My first thought was some kind of ...
7
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5answers
25k views

Wind force field not working

I am trying to get a waving effect for a flag in my animation I am working on. However when I click alt a the cloth fabric just hangs there not being affected at all by the wind. I have wind power at ...
6
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3answers
1k views

What does seed control in force fields?

I've been working with and fooling around with the magnetic force field. I noticed the seed number slightly change depending on the size of the force, but I wasn't sure what it did or what it ...
6
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1answer
2k views

How can a force be applied not to the center of a rigid body object, but to one specific vertex of the object?

Scenario: a stationary bar-shaped (rigid body) mesh floating in space (i.e., neither gravity nor friction/drag), that gets a short-lived force vector applied to one of its corner vertices, where the ...
6
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2answers
4k views

Cycles smoke not responding to wind

I made some dense smoke in cycles with the Quick Smoke simulation. I want the smoke to be blown to the left of the scene as if it's coming out of a smokestack, so I added a wind force field. No effect....
6
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1answer
3k views

Blender 2.8: Restrict influence of Force Field to its Collection

How do I restrict the influence of a Force Field to the Collection it's in? I'm trying to simulate falling leaves in Blender 2.8. I have a Collection with the Leafs_Emitter particle system and a ...
5
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1answer
9k views

Force fields affecting selected rigid body objects

Let's say I have an Active wooden cube and an Active iron cube in the scene. I also have another Passive cube with a Force force field at the same location. The force field has a negative strength so ...
5
votes
1answer
676 views

How to enforce planetary gravity on fluids?

I'm trying to make a scene with a few small planets, but when I went to make a lake/river I couldn't find any options to have the fluid's gravity be relative to a point (aka the planet's center). I've ...
5
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1answer
1k views

Particles unaffected by force fields

I'm trying to create a water scene where paper lanterns rise from the background (similar to this scene from the movie Tangled. I'm using a particle system to generate a bulk of lanterns to rise from ...
4
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2answers
530 views

How to create tentacles moving with the wind?

I have the feeling i'm on the wrong way to do this. Because its part of the mesh. So, maybe somebody know it. How can i add movement to the tentacles in the wind? Like Hair. Sadly the whole mesh move ...
4
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1answer
3k views

Are curve physics possible?

For example, I'm using a tree generator addon that creates trees in curve form. I have a strong wind forcefield in the scene as well for the grass. Is it possible to apply the curve to the physics?
4
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2answers
6k views

How to make a force field concentrate only on a specified area?

For example if I use 3 different object emitting particles, I only want 1 of them to get affected by the force field. I tried adjusting the area to be concentrated, but the force field affects ...
4
votes
1answer
354 views

What are common causes for Blend files growing in size?

I have this blend file that seems to be growing. The file size is now about 250MB. It contains this scene and the texture of the flag is 265kb and the texture of the sky is 640KB. I have a wind ...
4
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1answer
977 views

How can a cloth simulated sail be prevented from flying away?

I added a cloth simulation to a canvas and want it to be moved by a wind force. The sail is blown away. How can this be prevented?
4
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1answer
1k views

Apply force to a specific point

I would like to apply force to a specific point on the mesh. Could someone let me know how I can do that using Python scripting? The "applyForce" function applies the force to the center of the object....
4
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1answer
718 views

Can I make a smoke emission only be affected by a specific force field?

I'd like to animate a scene where two different smoke emissions are in the same vicinity but are affected by different force fields. Can this be done? Right now both emitters are in the same smoke ...
4
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1answer
2k views

What does the force field flow setting do?

What does the force field flow setting do? How is it typically used? Please provide examples.
4
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1answer
374 views

Can I make a force field that is defined with differential equations?

Can I make a force field in the xy plane that is defined with differential equations as: x' = f_1(x,y) (speed in the x-direction is dependent on x,y coordinates) y' = f_2(x,y) (speed in the y-...
4
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1answer
736 views

Affect explode modifier with force field

I'm trying to explode an object gradually with the explode modifier. I used the "quick explode" to get the initial setup. Then I turned particle physics off so that the the pieces stay in place. My ...
4
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1answer
456 views

How is the force necessary to counter gravity calculated in Blender?

Different values are required to balance forces in the physics tab with the force of gravity. For example, if the force of gravity is defined as -9.8, a force field setting of about 234 is required to ...
3
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1answer
2k views

Particle system - steers along path

I have few arrows to follow a particular path such a way that the arrows will always orient along (steer along) the path. Using 'curve guide', I was able to make the arrows flow along the path, but ...
3
votes
1answer
4k views

How does the Turbulence Force Field work?

I am doing a series of experiments with smoke & fire. I found a blend file that uses the Turbulence force field in a fire simulation. During the simulation the force field is moved along the Z-...
3
votes
1answer
812 views

Mesh with cloth simulation and particle instance modifiers (used in a particle system) not responding to wind

I want to create a simulation of leaves blowing in the wind using blender v2.72, just like this tutorial (archive). My problem is, I can't get the wind force field to act on the cloth simmed leaves ...
3
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1answer
3k views

Mesh with cloth simulation not responding to wind

I came across a model of a boat, and I tried to add some wind and cloth simulations to the sails and flags. The sails respond to the wind, but the flags do not, they just fall. In both cases I ...
3
votes
1answer
3k views

Is there a way to render particles as if they were a single liquid?

I don't want to use the fluid simulator beacuse i've been getting more controlled results with the particles system feature + using a guide as a force field. What i'm trying to accomplish is water ...
3
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1answer
654 views

Difference between the vortex and the wind force

In a recent answer, stacker stated that the vortex is better then the wind force for cloth simulations. What is the difference between the vortex and the wind? How does each relate to cloth ...
3
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1answer
507 views

How can I make scene with multiple gravities going in opposite directions without using a force field?

I'm making a scene with multiple gravities affecting different objects that can interact with each other (those gravities are going in two different directions so I can't just cheat by changing an ...
3
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1answer
2k views

How do I keep particles still?

I have a particle system that just doesn't want to stay still. I turned off all physics for it (including gravity) and removed all force fields, but they still move. Here's a gif of how they move: ...
3
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1answer
1k views

How do you copy things like rigidbody constraints and force fields to other objects?

How do you copy things like rigidbody constraints and force fields to other objects? I made a cell fracture and I would like to give each cell the same constraints and force fields. Thanks in ...
3
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1answer
1k views

Melt a complex mesh and then animate it using force fields

I am struggling while trying to perform a sequence which includes the following actions: Melt a mesh with a viscocity like mercury or something similar. Animate it with a force field, to achieve a ...
3
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0answers
136 views

tensor flow / deformable grid

I am trying to make a grid that i can deform, by adding points that acts like a magnetic field. Is it possible to create a grid that i can manually/auto deform like this? I need it to be one ...
3
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0answers
30 views

Multiple independent force fields

I'd like to simulate the CO2 adsorption process in several spheres (nanoparticles). I am able to do it in one, but I am struggling when adding a second, third, etc... mainly because when introducing a ...
3
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0answers
76 views

Making particles wander around on a plane

How do I make particles exist on a plane and make them move around on the plane by using a force field? I want to create something similar to this, but in blender so I can change the properties of ...
3
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0answers
239 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?
2
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2answers
148 views

how to make sure that the forcefield does not affect particle system

I'm working on a project which uses forcefield for soft body, but it is also effecting my particle system. how do i make sure it does not impact the particle system.
2
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2answers
2k views

Wind force field not affecting cloth object

I already looked online, but couldn't find anything that worked. can someone take a look? Here is the file:
2
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2answers
6k views

How to get wind to affect hair particles with group or object render

I am using a group to get more variation in grass stalks as per this tutorial. Unfortunately that tutorial was for a still image so did not cover wind or other force fields. From various other ...
2
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2answers
1k views

How can I make boids move along a path?

I'm making a flock of birds with boids. I want them to move along a path. I tried curve guide, but they always move away from the curve. If I make the particles Newtonian, then they follow the ...
2
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1answer
260 views

Making 3 points stick on a plane / flag with wind

I have a flag I want to waft in the wind. I imported the shape as an SVG from Adobe Illustrator. I converted the mesh to a curve. It wouldn't let me make some subdivisons but it still seems to work ...
2
votes
1answer
157 views

How do I rotate an object in an anti gravity simulation?

I am creating a shot where: gravity is turned off multiple objects are "floating" in space a few objects collide with eachother each object has it's own forcefield in order to propel it ...
2
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1answer
2k views

How to make a wind force field, does not affect all objects in front of it (cloth simulation)?

How to make a wind force field, to affect on some objects but does not affect on the others? In my case, I want the wind affect on clothes, hanging on the rope, but did not affect on the rope (the ...
2
votes
1answer
67 views

How to create Wind effect on circle logo

I am trying to animate a logo in the shape of a circle. The idea was to have it floating in the air and have some wind going through it. What I have done so far: I have used cloth simulation and the ...