Mantaflow grid visible in spray, foam and bubbles particles #79995
Labels
No Label
Interest
Alembic
Interest
Animation & Rigging
Interest
Asset Browser
Interest
Asset Browser Project Overview
Interest
Audio
Interest
Automated Testing
Interest
Blender Asset Bundle
Interest
BlendFile
Interest
Collada
Interest
Compatibility
Interest
Compositing
Interest
Core
Interest
Cycles
Interest
Dependency Graph
Interest
Development Management
Interest
EEVEE
Interest
EEVEE & Viewport
Interest
Freestyle
Interest
Geometry Nodes
Interest
Grease Pencil
Interest
ID Management
Interest
Images & Movies
Interest
Import Export
Interest
Line Art
Interest
Masking
Interest
Metal
Interest
Modeling
Interest
Modifiers
Interest
Motion Tracking
Interest
Nodes & Physics
Interest
OpenGL
Interest
Overlay
Interest
Overrides
Interest
Performance
Interest
Physics
Interest
Pipeline, Assets & IO
Interest
Platforms, Builds & Tests
Interest
Python API
Interest
Render & Cycles
Interest
Render Pipeline
Interest
Sculpt, Paint & Texture
Interest
Text Editor
Interest
Translations
Interest
Triaging
Interest
Undo
Interest
USD
Interest
User Interface
Interest
UV Editing
Interest
VFX & Video
Interest
Video Sequencer
Interest
Virtual Reality
Interest
Vulkan
Interest
Wayland
Interest
Workbench
Interest: X11
Legacy
Blender 2.8 Project
Legacy
Milestone 1: Basic, Local Asset Browser
Legacy
OpenGL Error
Meta
Good First Issue
Meta
Papercut
Meta
Retrospective
Meta
Security
Module
Animation & Rigging
Module
Core
Module
Development Management
Module
EEVEE & Viewport
Module
Grease Pencil
Module
Modeling
Module
Nodes & Physics
Module
Pipeline, Assets & IO
Module
Platforms, Builds & Tests
Module
Python API
Module
Render & Cycles
Module
Sculpt, Paint & Texture
Module
Triaging
Module
User Interface
Module
VFX & Video
Platform
FreeBSD
Platform
Linux
Platform
macOS
Platform
Windows
Priority
High
Priority
Low
Priority
Normal
Priority
Unbreak Now!
Status
Archived
Status
Confirmed
Status
Duplicate
Status
Needs Info from Developers
Status
Needs Information from User
Status
Needs Triage
Status
Resolved
Type
Bug
Type
Design
Type
Known Issue
Type
Patch
Type
Report
Type
To Do
No Milestone
No project
No Assignees
5 Participants
Notifications
Due Date
No due date set.
Dependencies
No dependencies set.
Reference: blender/blender#79995
Loading…
Reference in New Issue
No description provided.
Delete Branch "%!s(<nil>)"
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?
System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.67
Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-08-21 15:43, hash:
74ded456b3Short description of error
Spray, foam and bubbles particles take the shape of the grid when simulated.
Exact steps for others to reproduce the error
mantaflow_bug.blend
Foam and bubble particles are very blocky and unnatural
Added subscriber: @thornydre
Added subscriber: @iss
Changed status from 'Needs Triage' to: 'Needs User Info'
Please upload simplest possible .blend file that represents the issue. I don't think you need 3GB of data for that. Even if those are caches, we need to re-bake(should be quick as well) to confirm issue.
Sorry for that, here is the file without the caches, and the videos :
mantaflow_bug.blend
Bubbles:
mantaflow_bug3_bubbles_front.mp4
Foam:
mantaflow_bug2_foam_front.mp4
Spray:
mantaflow_bug1_spray_front.mp4
Changed status from 'Needs User Info' to: 'Needs Triage'
Added subscriber: @Raimund58
Could reproduce it in Blender 2.91 (commit date: 2020-08-25 19:28, hash:
![2020-08-26 16_37_47-Blender_ [F__temp_mantaflow_bug.blend].png](https://archive.blender.org/developer/F8812343/2020-08-26_16_37_47-Blender___F__temp_mantaflow_bug.blend_.png)
396d39c6b9)Changed status from 'Needs Triage' to: 'Confirmed'
Blender 2.83.5
Added subscriber: @sebbas
Looking into this right now. There was a similar issue in #73552 - seems like foam and bubbles still have issues.
Hey, I just wanted to know if there was any news about this bug ?
@sebbas Is this indeed similar to #73552? I am a bit curios about the outcome :)
@Raimund58 The reason for the grid patterns are the hard cut-off values for spray, foam, bubble transitions. I.e. the values that determine when a particle changes type.
For now, the only way I see to get around this is to use a higher particle grid resolution (e.g. particle upres = 2 -> twice the base resolution). Depending on the scene and hardware limits, I would also lower the sampling values to better control the number of particles.
Alright, thank you for the info :)
Mantaflow (fluid simulator) has no active developer at the moment. Moving those bugs as known issues so at least other users can find their issues already reported.