Questions tagged [physics]

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

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4 views

Empty as a hinge does not work

I'm following a physifcs course and I added a hinge on a new empty, but it does not behave like I'd expect it to [and what the course shows]. I expected the whole thing to rotate around the hinge, and ...
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7 views

HighPoly Body with Soft Body physics

I'm trying to make a human soft body deform in contact with other shapes like an empty skin, but I'm really having hard time to figure this out. I don't know if it is because of the highpoly human ...
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I have a project which requires baking a fluid simulation and rendering within the time limit, its been one hour and its stuck at 0%

Im trying to render a small toy ship falling into a block of water.. I just did a basic fluid sim, following the same steps I always do (which usually works) and I replaced a ball with the OBJ ship ...
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soft body mesh has too much friction

I've created a soft body with a hole inside so that it can glide down along a rod. But for some reason the soft body is not gliding... The friction value of the soft body is 0 as well for the rod. I ...
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I am new to blender and I am trying a fluid sim but its stuck at 0%

I don't know if I am doing it right or not but it's stuck at zero. The fluid quality is at 125 and pretty choppy. I don't know if I'm doing something wrong or not but it's stuck at zero. I would ...
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1answer
10 views

How to remove rigid body setting from all the objects?

I have a big scene that I partly created using rigid body physics. I am happy with the objects now and I applied the visual transform, but I don't know a way to remove all the physics from this system ...
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15 views

How do I make a teleporter for rigidbodies?

Is there a way to make a rigidbody move to pointA when it touches pointB? I'm sorry if this is a really dumb question but it would help a lot.
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1answer
27 views

Snow storm effect without lighting

I would like to create a snow storm without using light to illuminate the snow. The giant lighting fixtures used in other tutorials such as: https://www.youtube.com/watch?v=KWYBoBmAW3A and others all ...
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Fluids passing through effectors Mantaflow Blender 2.82

In one of my classes in college I was asked to animate a pipe with running water. I looked at many Youtube tutorials on fluid simulations and managed to make a simple one. However, when I try to make ...
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1answer
21 views

Cloth collision with rigid body stuck at starting point

I wanted to simulate an object falling above a cloth, but found that it kept falling through no matter what I do, while trying to figure out what's wrong I also found that when I put the object under ...
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1answer
64 views

What causes fire to gradually turn off or disappear?

I use blender 2.80 (The old smoke simulation). When I bake the last 251 frames of the movie, the fire works well then, it gradually turns off! Click here to download the blend file. Here are the ...
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2answers
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Setting particle emission at random keyframes?

I'm creating a physical simulation of apples falling into a box using the bullet particle system and Copy Particles to Rigid Bodies code by liero. However, the apples always fall in equal frame ...
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What would be the simplest way to create a vertical or horizontal cell fracture / realistic wood break?

I want to create a piece of cracking wood in blender for a project of mine, I made a blender-guru esque ball n' chain destruction setup, made a simple cell fracture wall, put a wood material on it, ...
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How can I prevent my collision objects from intersecting?

I'm trying to simulate an elastic beam draped over the edge of a box. I'm close, but the beam penetrates the corner of the box (see photo). The beam is a NurbsPath softbody and the box and floor are ...
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1answer
14 views

Rigi body physics - box inside another box is pushed out of it

I'm trying to create a simple physics scene. I've placed a box inside another box but the box is pushed out of the box. Even when I flip the normals of the biggest box... Why is this happening? Here ...
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2answers
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Is there a way to make a ball bounce endlesly? (using soft body and physics)

I can make a ball bounce endlessly by using keyframes - but i'm looking for that cool softbody+phsyics "giggle" when the ball gets when it hits the ground. Unfortunately i couldn't figure out if its ...
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1answer
20 views

Visualization for the refraction of a light beam with a lens

How possible is it to create a lens in blender that, depending on the index of refraction, visually shows the change in the focal point.
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1answer
54 views

Blenderguru's Coffee tutorial: Coffee does not reflect correct in Viewport/Rendering

UPDATE: So resetting default preferences helped. But I checked the preferences file (not readable with editor). I then screenshot evry settings tab and compared with factory settings. There was no ...
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Changing the Rigid Body State from Passive to Active as Keyframe in timeline?

I would like to have the green balls be active rigid bodies (all others passive rigid bodies), fall under gravity and roll away. Then, at a later time-stamp, the blue balls become Active bodies (...
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12 views

Is it possible to assign weight to an specifik area of an object for simulating planes with a weight painted vertex group?

I am trying to simulate a rc plane in blender 2.8. I want the physics to be as close to a real world scenario as possible. The only problem i'm having is that the weight of the plane is distributed ...
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10 views

Problems With Smoke Simulation

I am trying to render a car burnout animation that involves smoke simulation with inflow being the rare tires. Instead of rendering smoke it's rendering the domain (cube) instead... I've tried looking ...
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9 views

How do you make a plane bend depending on nearby objects [duplicate]

This is the desired effect I would like to have: I would like to be able to have a mesh (plane) to be able to create "dips" when an object comes near it. In addition to this, it would be great if ...
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13 views

Why is my quick smoke simulation lagging on a Ryzen 7-3800x? Blender 2.82(just downloaded for pc)

Hi I recently built a pc which has a Ryzen 7 3800x which should be a pretty solid CPU for blender (i thought judging by the benchmarks) but when I try to playback a simple smoke and fire simulation my ...
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Active meshes keep bouncing and slipping away from passive meshes

Attached here is a link to a video of a problem that I am addressing. https://youtu.be/GE4nFNFLEZA I am working on this render, and I applied the "passive" rigid body tool to both the ground and ...
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7 views

Fire physics not appering in render

please don't laugh of what I am making. I want to use fire physics without the Adaptive Domain. But when it's off, the fire is in the preview but it's not in the final render. Why? I don't want to ...
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1answer
21 views

I can't find object control in fluid simulation blender 2.82

In the older versions of blender the fluid physics had the option of making an object a 'control object' to manipulate the fluid flow with its shape. Now in 2.82 i can't find this option and i still ...
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15 views

Low poly long coat cloth simulation

I made this model of a girl who's wearing a long coat. I want the lower part of the coat to have cloth physics. I understand how to make it simulate cloth, I know how to attach it to the rest of the ...
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1answer
14 views

Can't access “High Resolution” option in Physics Properties

So, I was fooling around with beginner Blender tutorials and I was trying to learn how to set a monkey head on fire (random, I know). Problem is, I'm supposed to check "High Resolution" in Physics ...
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37 views

Throwing Objects in blender

I wanna know how to throw objects in blender 2.8 when grabbing and then throwing it while keeping it in place because every time something picks up and i use transform to move the object around, it ...
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10 views

Can we use both drivers and physics properties at the same time

Today I tried to make an animation of coin that rotates on the z axis placed perpendicular to the plane, When I applied rigid body constraint (active) to coin and rigid body constraint (passive) to ...
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Boid particle as collection armatures and parented bodies move separately

I was looking for a crowded mass of people moving in one direction for my project. I wanted diversity between people so I was looking for modeling, texturing and animating a bunch of different persons ...
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22 views

How to move a dense mesh irregular object above other object surface in a especific direction?

Hello I m new in Blender and I ve trying to solve the next problem for a long time but I couldn t find an appropite solution. So I m writing to you and maybe you can help me. My problem is the ...
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16 views

How to have a hair particle system act under gravity

So what I am trying to do is get an object to emit another object in a hair particle system from particular vertices at right angles and then have the emitted particles act under gravity. I've managed ...
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22 views

Mantaflow effector not affecting my liquid sim

I am trying to move an effector cube through the liquid, but moving cube is not affecting liquid. here is my blend file, https://blenderartists.org/uploads/short-url/dNjuBxIVXEXHiFyUrAeHqHYYcr6.blend ...
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1answer
27 views

How can I send someone a .blend file with cache folder included?

I've been trying to send a person my .blend file with an external cache folder (.bphys format) to render a fire for me, and when he opens it, he can't connect the two. Any solutions?
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1answer
100 views

Adding cloth physics to vertex group

I was wondering how to apply cloth physics to this cape vertex group. I do not need cloth physics on the rest of the mesh. The cape is apart of the mesh and is not separate. Any help is appreciated. ...
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6 views

sculpt brushs only go in a flat way?

In sculpting mode, the brush behaving as a clay brush whatever I enlarged the strength value. thank you for your reading
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12 views

Rigid Body World bake using multiple CPU cores

I'm trying to bake some rigid bodies simulation and I'm quite new to this. I can see only one CPU core at 100% while baking, is it right? I've found this question from som years ago: 2.74 not using ...
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1answer
24 views

Can't seem to bake fire animation?

I am new to baking and animation in general, but I was in the process of trying to add a basic fire/smoke animation in Blender 2.82. In the process, I create my smoke domain (using quick smoke) and ...
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16 views

How do I attach two objects with a physical force?

How to attach 2 objects so that connection would be physical, attached with some force? like gluing two objects in real life, you can detach objects pulling them apart from one another, with some ...
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11 views

Rigid Body Simulation colliding spheres intersect

I am trying to create a random packed bed (cylinder filled with spheres). For the cylinder I added it from the add mesh option and deleted the top face and added some thickness using solidify modifier;...
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How can I reduce the friction of Mantaflow colliding with effectors?

Just experimenting with liquids in Blender (I’ve only just got into doing fluid sims). Finished this tutorial and did some experiments of my own with collision effectors, such as some whiskey dropping ...
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1answer
70 views

Why does my Mantaflow waterwheel not work?

Apologies if this doesn't light correctly, I omitted the HDRI I was using to save space for upload and download of the .blend. Plug in your HDRI of choice and the scene should look fine (or turn off ...
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13 views

Parts of the braid not connected to it/not acting as part of it

I wanted to add physics to the braids but I had no success: the ends of it keep falling. Tried connecting, empties technique (adding empty boxes, alligning them with bones and make it influence the ...
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1answer
20 views

How do I freeze a frame of a Mantaflow Smoke sim?

I have a 75 frame smoke sim (Mantaflow- made in 2.82 release version) , with noise baked on it- all good so far. Now- how do I freeze, say frame 75 and have the same smoke, static, for as long as I ...
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33 views

Wrapping a plane onto a sphere as it changes height [duplicate]

Hope someone out there can help answer my question or at least direct me to a path. I want to animate a plane wrapping onto a sphere as the sphere goes through the plane. Another way of putting it: ...
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2answers
68 views

Fire simulation in 2.82

I made animation in 2.79 & I opened it in 2.82 to render. All effects work (dynamic paint, ocean, particles, soft body), but fire doesn't work. It doesn't even appear in preview window. Also, all ...
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66 views

How would you approach simulating garbage being compacted?

If I wanted to crush mesh objects into a form, and show that process, (like a garbage compactor) how would I approach that?
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22 views

partial fracturing

I’ve been looking on the internet but have not found any answers. How to make an object not fall apart entirely when being hit by another object. So that it can still move around with the pieces, ...
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20 views

How to delay liquid->geometry in fluid simulation?

i want to simulate a waterdrop hitting a settled water surface using the fluid simulation in blender 2.82. For that i fill a bowl with water the first x frames and let it settle a while. Then after ...

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