Blender is impossibly slow with large scenes #67172

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Tyler Walker · 2019-07-18T15:30:54+02:00

Tyler Walker commented

2019-07-18 15:30:54 +02:00

System Information
Operating system: Windows 10
Graphics card: Radeon RX 580 (8Gb)

Blender Version
Broken: (2.80, release candidate)
Worked: never

Large scenes (>1-2 km) are incredibly slow in blender 2.8 compared to 2.79. I imagine the problem is because of two things: the lack of a LOD system, and texture rendering. It basically kills hope of making cinematic city scenes, landscape scenes, forest, etc. I've seen this problem on multiple computers running 2.8, so it doesn't seem to be a machine-dependent issue with processing.

Create a scene larger than 1km or 2km and set the clipping distance to about 2km. Add a few hundred thousand polygons to the scene. Add materials and textures. Watch Blender cry.
I used the Scenecity addon to great frustration, and you could likely reproduce it with that.

**System Information** Operating system: Windows 10 Graphics card: Radeon RX 580 (8Gb) **Blender Version** Broken: (2.80, release candidate) Worked: never **Large scenes (>1-2 km) are incredibly slow in blender 2.8 compared to 2.79. I imagine the problem is because of two things: the lack of a LOD system, and texture rendering. It basically kills hope of making cinematic city scenes, landscape scenes, forest, etc. I've seen this problem on multiple computers running 2.8, so it doesn't seem to be a machine-dependent issue with processing.** **Create a scene larger than 1km or 2km and set the clipping distance to about 2km. Add a few hundred thousand polygons to the scene. Add materials and textures. Watch Blender cry.** I used the Scenecity addon to great frustration, and you could likely reproduce it with that.

Tyler Walker commented

2019-07-18 15:30:54 +02:00

Added subscriber: @tyler.tofu

Gavin Scott commented

2019-07-18 18:53:05 +02:00

Added subscriber: @GavinScott

Gavin Scott commented

2019-07-18 18:53:05 +02:00

If you could attach an example scene to the report that would be quite helpful.

Brecht Van Lommel commented

2019-07-18 19:00:08 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2019-07-18 19:00:08 +02:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2019-07-18 19:00:08 +02:00

Brecht Van Lommel self-assigned this 2019-07-18 19:00:08 +02:00

Brecht Van Lommel commented

2019-07-18 19:00:08 +02:00

We'll work on improving handling of complex scenes (one of the tasks in #63728 (Data, Assets & I/O Module)).

However as a bug report this is not so useful, it's just an ongoing project and investigating performance of specific production scenes is outside the scope of the bug tracker.

We'll work on improving handling of complex scenes (one of the tasks in #63728 (Data, Assets & I/O Module)). However as a bug report this is not so useful, it's just an ongoing project and investigating performance of specific production scenes is outside the scope of the bug tracker.

JB commented

2020-12-25 17:28:07 +01:00

Added subscriber: @Mundi_Umdali

JB commented

2020-12-25 17:28:07 +01:00

Same issue. I have a platform is a thousand by a thousand feet. I have a super simple scene set up with scene city currently and oh god. I am using a grid city preset node thing at 200x200 cell size 20. It is wanting to die on me and it is not my memory and such. I am looking at it. About 20 percent across the board. I am only trying to cover a 852 foot by 852 foot area in the center of my project. It is impossible.

     Blender 2.91
     CPU

AMD Ryzen 9 3950X 16-Core Processor 
NVIDIA GeForce GTX 1660 Ti

      Windows 10

Same issue. I have a platform is a thousand by a thousand feet. I have a super simple scene set up with scene city currently and oh god. I am using a grid city preset node thing at 200x200 cell size 20. It is wanting to die on me and it is not my memory and such. I am looking at it. About 20 percent across the board. I am only trying to cover a 852 foot by 852 foot area in the center of my project. It is impossible. ``` Blender 2.91 CPU ``` AMD Ryzen 9 3950X 16-Core Processor NVIDIA GeForce GTX 1660 Ti ``` Windows 10 ```

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Blender is impossibly slow with large scenes #67172