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Yuriy (Faraday)
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User Since
Jan 27 2017, 1:08 AM (179 w, 5 d)

Recent Activity

Thu, Jun 25

Yuriy (Faraday) added a comment to T77833: Mantaflow (GAS) The simulation does not work correctly when using an object for collisions..

I tried to bake the simulation with a resolution of 150. And I noticed that if the simulation is paused, the simulation will be unstable at the end.
Below is a video in which I paused the simulation twice.

And in this video, the simulation is without a pause.

Maybe it's a pause. But the noise is clearly baked incorrectly (examples are above).

Thu, Jun 25, 7:36 PM · BF Blender
Yuriy (Faraday) added a comment to T77833: Mantaflow (GAS) The simulation does not work correctly when using an object for collisions..

It turned out to repeat the unstable simulation at a resolution of 200. No noise.
Fire and smoke should be from the first frame, but they are not. In the end, the simulation is very unstable.

1)Select a torus and bake the particle system.
2)Choose a domain and bake gas.

Thu, Jun 25, 5:54 PM · BF Blender
Yuriy (Faraday) updated the task description for T77833: Mantaflow (GAS) The simulation does not work correctly when using an object for collisions..
Thu, Jun 25, 5:25 PM · BF Blender
Yuriy (Faraday) added a comment to T77833: Mantaflow (GAS) The simulation does not work correctly when using an object for collisions..

And one more example with Noise.

Thu, Jun 25, 5:17 PM · BF Blender
Yuriy (Faraday) added a comment to T77833: Mantaflow (GAS) The simulation does not work correctly when using an object for collisions..

I can’t repeat the “explosion” of the simulation on the low domain settings.
After running a few low-resolution tests on the domain, I noticed that Noise affected the simulation behavior.
Below is a video without noise.

Below is the same simulation, only with noise. Level 1

I also found a video on YouTube, in which you can see the "explosion" of the simulation. This happened with Noise enabled.
https://youtu.be/df7_yW_9-M8?t=123

Thu, Jun 25, 5:16 PM · BF Blender

Tue, Jun 23

Narek Avetisyan (Arken) awarded T77713: Mantaflow (GAS). The cache is deleted when the Upres factor of noise is switched. a The World Burns token.
Tue, Jun 23, 9:49 PM · Nodes & Physics, BF Blender

Tue, Jun 16

Yuriy (Faraday) updated the task description for T77831: Mantaflow (GAS) motion blur doesn't work..
Tue, Jun 16, 6:01 PM · Nodes & Physics, BF Blender
Yuriy (Faraday) added a comment to T77831: Mantaflow (GAS) motion blur doesn't work..
  1. Download this blend file
  2. Select "Torus" and bake particles
  3. Select "Smoke Domain" and bake data of gas
  4. Render
  5. If render looks good, switch frame. For example, select 67 frame and render. Or another frame.

Video showing steps:

Tue, Jun 16, 5:51 PM · Nodes & Physics, BF Blender

Sat, Jun 13

Yuriy (Faraday) created T77833: Mantaflow (GAS) The simulation does not work correctly when using an object for collisions..
Sat, Jun 13, 2:06 PM · BF Blender
Yuriy (Faraday) created T77831: Mantaflow (GAS) motion blur doesn't work..
Sat, Jun 13, 1:41 PM · Nodes & Physics, BF Blender

Wed, Jun 10

Yuriy (Faraday) updated the task description for T77716: Mantaflow (GAS). Gas simulation does not work when particles are the emitter of gas..
Wed, Jun 10, 10:28 AM · BF Blender
Yuriy (Faraday) updated the task description for T77716: Mantaflow (GAS). Gas simulation does not work when particles are the emitter of gas..
Wed, Jun 10, 10:25 AM · BF Blender
Yuriy (Faraday) created T77716: Mantaflow (GAS). Gas simulation does not work when particles are the emitter of gas..
Wed, Jun 10, 10:24 AM · BF Blender
Yuriy (Faraday) created T77713: Mantaflow (GAS). The cache is deleted when the Upres factor of noise is switched..
Wed, Jun 10, 10:08 AM · Nodes & Physics, BF Blender

May 12 2020

Yuriy (Faraday) created T76674: Mantaflow (GAS) does not render the Velocity attribute..
May 12 2020, 11:51 AM · BF Blender

Feb 27 2020

Yuriy (Faraday) added a comment to T74171: Mantaflow: Slight jitter of the Domain object. Gas..

Frames 88-89.

Feb 27 2020, 10:19 AM · Nodes & Physics, BF Blender

Feb 26 2020

Yuriy (Faraday) added a comment to T74171: Mantaflow: Slight jitter of the Domain object. Gas..

Most likely, jitter occurs when the adaptive Domain begins to trim the excess voxels. When extra voxels are removed, the noise information becomes incorrect and the noise shows artifacts.



And another test.

Feb 26 2020, 3:27 PM · Nodes & Physics, BF Blender
Yuriy (Faraday) added a comment to T74171: Mantaflow: Slight jitter of the Domain object. Gas..

I found out that jitter only appears with Noise enabled in the Domain settings. Without noise, baked smoke does not tremble. In the video, the result is first with noise, then without noise.
I uploaded the cache. Only 180-190 frames.

Feb 26 2020, 10:13 AM · Nodes & Physics, BF Blender
Yuriy (Faraday) updated the task description for T74171: Mantaflow: Slight jitter of the Domain object. Gas..
Feb 26 2020, 9:48 AM · Nodes & Physics, BF Blender

Feb 24 2020

Yuriy (Faraday) updated the task description for T74171: Mantaflow: Slight jitter of the Domain object. Gas..
Feb 24 2020, 3:49 PM · Nodes & Physics, BF Blender
Yuriy (Faraday) created T74171: Mantaflow: Slight jitter of the Domain object. Gas..
Feb 24 2020, 3:47 PM · Nodes & Physics, BF Blender
Yuriy (Faraday) added a comment to T74078: Mantaflow: Flame not working correctly when animating a Fuel value..

Also, if you pay attention, at the end of the video you can notice how the smoke is shifted jerky. I recorded a video in which you can notice a jerk when I switch between 182 and 183 frames. After frame 183, the jerk is repeated several more times. On the 188 frame smoke artifacts are visible. Perhaps this is the result of the adaptive domain. Shaders are not animated. The camera is not shaking. In the recorded video, you can see the animation curves of the camera. Perhaps this problem should be moved to a separate Task. I have not tried to reproduce the shake with poor quality smoke.
This is the latest version of my file.

Feb 24 2020, 10:29 AM · Nodes & Physics, BF Blender

Feb 23 2020

Yuriy (Faraday) added a comment to T74078: Mantaflow: Flame not working correctly when animating a Fuel value..

Render results. File test_smoke_mantaflow.blend.
It can be seen that the fuel does not burn out. The fire disappears in one frame.

Feb 23 2020, 5:46 PM · Nodes & Physics, BF Blender

Feb 21 2020

Yuriy (Faraday) added a comment to T74078: Mantaflow: Flame not working correctly when animating a Fuel value..

In the file test_smoke_mantaflow.blend, the fire does not work correctly.

This is a light version in which smoke and flame bake quickly.
When the Fuel value reaches zero, the fire instantly disappears.
File 2.82.blend loaded correct. The result of baking as on a gif animation.

Feb 21 2020, 4:23 PM · Nodes & Physics, BF Blender
Yuriy (Faraday) updated the task description for T74078: Mantaflow: Flame not working correctly when animating a Fuel value..
Feb 21 2020, 3:20 PM · Nodes & Physics, BF Blender
Yuriy (Faraday) created T74078: Mantaflow: Flame not working correctly when animating a Fuel value..
Feb 21 2020, 3:12 PM · Nodes & Physics, BF Blender

Feb 17 2020

Yuriy (Faraday) created T73914: Unable to select bone in pose mode..
Feb 17 2020, 10:27 AM · EEVEE & Viewport, BF Blender

Nov 13 2019

Yuriy (Faraday) added a comment to T71068: Incorrect baking animation..

I tried to make animation without constraints. Just manually change the scale and rotation. It is not possible to achieve the desired result. Probably you can’t do without disabling scale inheritance.

Nov 13 2019, 10:35 AM · Animation & Rigging, BF Blender

Nov 12 2019

Yuriy (Faraday) added a comment to T71068: Incorrect baking animation..

Can't bake an animation based on cyclic dependencies? Perhaps using a new algorithm?
I understand that the animation is well baked if the bones do not have a parent with each other. But in the skeleton of a game, the spine, arms and legs must be connected.
For example, in a gif animation, a character is shown in UE4, in which the spine is squashed and stretched. How to bake a similar animation in Blender?


Maybe here Scale inheritance from parents in UE4 is simply disabled.
source https://youtu.be/tWVZ6KO4lRs?t=645

Nov 12 2019, 3:15 PM · Animation & Rigging, BF Blender
Yuriy (Faraday) added a comment to T71068: Incorrect baking animation..

Here is an example with a repeating transformation rig. Animation is baked incorrectly.


Nov 12 2019, 12:26 PM · Animation & Rigging, BF Blender

Nov 9 2019

Yuriy (Faraday) added a comment to T71068: Incorrect baking animation..

If I want to make a flexible back and limbs, then after baking visual keys, the animation does not look right.


This is UE4Skeleton. It repeats the transformation of the deforming bone rigify.
Expectation: visually the back is bent, everything works correctly. After baking visual keys, the animation looks exactly the same.
In fact: After baking visual keys, the animation does not look right.

Nov 9 2019, 2:43 PM · Animation & Rigging, BF Blender
Yuriy (Faraday) added a comment to T71068: Incorrect baking animation..

Short description:
If I see that the bone stands in place at coordinates 0.0.0, then after baking the visual keys, I should see that the bone stands in place at coordinates 0.0.0
more details:


Bone is the parent for Bone.001. And bone Bone.001 is the parent for Bone.002. If a coordinate transformation occurs at Bone.001, then Bone.002 inherits these transformations.
Bone.002 has constraint Copy Transforms. Bone.002 copies the bone transformation of Bone.003. Bone.003 is at rest, and the bone of Bone.002 is also at rest, no matter how the transformation of its bone of the parent Bone.001 changes.
Expectation: after baking visual keys, the animation will be the same as with rig.
In fact: after baking visual keys, the Bone.002 bone has its own transformation keys, and also inherits the transformation from the parent’s bone. Animation does not look the same as with rig.
Perhaps you need to change the algorithm for baking visual keys so that the bones take into account the transformation of the parents.

Nov 9 2019, 2:36 PM · Animation & Rigging, BF Blender

Nov 7 2019

Yuriy (Faraday) added a comment to T71068: Incorrect baking animation..

This is very important for animators working in gamedev. With improper baking animations, you can not do good squashing and stretching.

Nov 7 2019, 11:07 AM · Animation & Rigging, BF Blender

Oct 28 2019

Yuriy (Faraday) added a comment to T71068: Incorrect baking animation..

And a simple rig. Pay attention to the foot.

Oct 28 2019, 11:53 AM · Animation & Rigging, BF Blender

Oct 24 2019

Yuriy (Faraday) updated the task description for T71068: Incorrect baking animation..
Oct 24 2019, 11:39 AM · Animation & Rigging, BF Blender
Yuriy (Faraday) created T71068: Incorrect baking animation..
Oct 24 2019, 11:34 AM · Animation & Rigging, BF Blender

Jul 11 2019

Yuriy (Faraday) created T66712: A model shows artifacts in the sculpt mode..
Jul 11 2019, 5:10 PM · BF Blender

Jul 1 2019

Yuriy (Faraday) created T66301: Blender crush when using Vertex slide..
Jul 1 2019, 1:50 PM · BF Blender

May 20 2019

Yuriy (Faraday) added a comment to T63400: Incorrect operation of the exporter FBX files..

It seems now the export works correctly. Version of the blender f606f588455e from 20.05.2019.
Version fbx 4.14.8.

May 20 2019, 5:37 PM · Add-ons (Community)

Apr 8 2019

Yuriy (Faraday) created T63400: Incorrect operation of the exporter FBX files..
Apr 8 2019, 7:56 PM · Add-ons (Community)

Jan 27 2017

Yuriy (Faraday) added a comment to T50535: Cycles render segfault when Explode modifier before hair particle modifier + UV material.

sample I think the problem is in the Exploid modifire.

Jan 27 2017, 10:32 AM · BF Blender
Yuriy (Faraday) updated the task description for T50535: Cycles render segfault when Explode modifier before hair particle modifier + UV material.
Jan 27 2017, 3:04 AM · BF Blender
Yuriy (Faraday) updated the task description for T50535: Cycles render segfault when Explode modifier before hair particle modifier + UV material.
Jan 27 2017, 2:57 AM · BF Blender
Yuriy (Faraday) updated the task description for T50535: Cycles render segfault when Explode modifier before hair particle modifier + UV material.
Jan 27 2017, 2:57 AM · BF Blender
Yuriy (Faraday) created T50535: Cycles render segfault when Explode modifier before hair particle modifier + UV material.
Jan 27 2017, 1:59 AM · BF Blender