Questions tagged [performance]
Questions pertaining to software performance or computational speed of Blender should use this tag. (Do not ask hardware specific questions. They are considered off-topic)
467 questions
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Performance drop when updating shader node field variables in large scenes through python script
for a project I’m working on, I am importing a large number of objects (on the order of 100,000 objects) and creating variations of the same material for each.
However, I noticed that the import times ...
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11
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Weight Painting CPU utilization is low
Does anyone have an idea why my CPU is only being used <40% for weight painting?
I have confirmed in the resource monitor that Blender is using all of my cores equally (good), but under 40% for ...
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43
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playback animation's performance is too slow
I would like to speed up the animation viewport. they are too slow it's very irritating I did low simplify. nothing works
What can I do to fix the slow performance?
please also add picture As an ...
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307
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"No compatible GPU's found for cycles" Linux
I'm new to blender (started in 4.1) and when 4.2 releases, I noticed an HUGE perfomance drop in rendered and material preview view. I saw on reddit that I just had to go to Preferencies, System, Cycle ...
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43
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Unable to achieve real time playback in Blender even after baking
I have a hard time making Blender playback in real time. The project I'm working on is set to 25fps and includes a live action video set as a background image, an animated camera, and a simple ...
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111
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bpy.app.timers.register is lagging Blender
In my blender python script I have a function which reads data from a serial port then moves the position of an object based on that data.
I use ...
- 423
6
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1
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232
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Implement "while" loop in Geometry Nodes
Blender 4.0 introduced Repeat Zones, however they represent a for loop without a way to break early. This means a while loop can't be implemented in Geonodes as: [not using Python as an example as ...
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75
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How can I make this script not get exponentially slower?
I'm trying to linked-duplicate an object with nested sub-objects.
I've rewritten bpy.ops.duplicate_move_linked() as a function without ...
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13
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Can blender make use of an integrated GPU and a discrete GPU at the same time to speed up renders? [duplicate]
I was thinking about getting an APU for my next build and was curious if I also get a discrete GPU can blender make use of both kind of like a dual GPU render? Would there be any performance increases ...
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25
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Performance loss with animation in Blender
when I play the same animation using Blender and C4D I get an absurd difference in performance in each software. In Blender it's running at 4~5 FPS with Simplify and Frame Dropping active, while in ...
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Is it possible to limit the number of GPU cores in new MacBooks M series?
I am using blender 4.1 with a MacBook M3.
I am rendering using the CLI and while rendering some scenes I would like to keep using the computer to do some other stuff, so I was wondering if there is ...
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456
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frequent crashes and freezes on Linux [closed]
My problem
I recently removed gdm3 from my system to switch to KDE Plasma. Since then, the normal blender starter shortcut doesn't work any more; the program appears in the taskbar and, without ...
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41
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Does Blender python run slower when strictly typing?
I have a code snippet without strict data-typing:
...
- 396
2
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338
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Blender very slow to start up - some network problem [duplicate]
I'm trying to figure out why Blender is so slow to start on my Windows machine. I'm using version 4.0.1, but it was similar with previous versions too. The problem seems to be somehow network-...
- 334
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More Viewport windows = slower switching back from Full Screen?
I finally upgraded from 3.6 to 4.0 and immediately noticed a huge impact to my workflow speed when switching back-and-forth between a 4-pane viewport setup and Full Screen. I'm seeing about 3 seconds ...
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Play Animation Too Slow when parenting (Keep Transform)
I have created a simple mess with a simple UV sphere and have used the arrays and curve modifiers around a bezier circle to surround the UV sphere with spikes. the spikes are simple circles extruded.
...
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28
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Startup always crashing and very slow
I just updated to Blender 4.02 and am having crazy lag and crashes. Was hoping the update would fix the issue..
I'm using a Nvidea 4080 and 32gb RAM but for some reason I'm experiencing a lot of lag. ...
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150
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Blender freezes when adjusting editing materials and value slider
Been having this issue for a long time and can't seem to find the answers. While in Render View any material value slider adding nodes/removing etc blender will freeze and viewport goes grey while it ...
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72
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Joining objects without loosing texture paint and material
I'm experiencing terrible performance with Blender 4.0.2 and Macbook Pro M1 16GB Ram, 1 TB SSD with 200GB of free space. Last week Blender was amazing now it crashes everytime I press Undo or even ...
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250
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How to render a lot of hairs easily
I try to make a rug generator with geometry nodes. I already have a functional generator for the shape of the rug but I struggle to render a large amount of hairs.
I might need to make large rugs (...
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2k
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Compiling Shader.... taking too much time. "Hacks" to speed it up?
This is my node tree.
I'm still working on it and, as in right now, for every node change I have to wait more than 40 seconds for the shader to recompile and it's unmotivating and extremely time ...
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347
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GPU Subdivision vs CPU Subdivision on M3 Max
I recently got my hands on a laptop with a GPU, and was playing around with it when I noticed there's a "GPU Subdivision" option in the preferences.
I'm assuming that enabling this offloads ...
- 397
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25
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all of my windows such as dope sheet, graph editor and such are completely black however the 3d viewport is completely fine
blender update 4.0 on both browser version and steam version
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63
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Coloring lots of cubes
I'm generating lot's of cubes this was (code from the solution to one of my previous question: Low level fast way to create cube). I want to add different materials with colors to the cubes, so I've ...
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211
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Low level fast way to create cube
In the answer to this question it's said that the high level ops functions have low performance since they do a scene update:
Python performance with Blender operators
I'm looking for a low level ...
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189
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Why are linked objects from another file laggy, and same objects are fast when appended?
I have a laggy file that will take up to 12 seconds to select a basic object and take up to 14gb of memory, to fix this I open a new blend file and append all the objects and now there is no delay and ...
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23
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Having a lot of copies of the same rigged character each posed differently. How to improve performance?
I am trying to make a scene which uses the same rigged character about 40 times but posed differently each time. It gets resource intensive and I was wondering if there is a way to optimize this since ...
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148
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I don't have the timings option in the node editor [duplicate]
Pretty much what I said in the title, even though I have blender 3.6.1, the timings option does not show up in the top right menu of the node editor (shading).
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2
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1k
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Bad Viewport Performance on Good Machine
My blender keep stucking on "not responding" every few clicks and runs a simple animation at only 7 fps, even though Im in solid mode. I have a fairly good PC but Blender isn't using all it'...
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301
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Geonodes: which is faster, Set Position or Transform node?
Not sure if BSE is a good place for such benchmarks, feel free to let me know with downvotes (question downvotes are free).
Since many operations can be done by both, which of the two should be ...
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185
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Blender Mesh has duplicated materials
I have a huge problem. I’m a game developer and currently trying to create a level with Lego buildings. So I export them as zmbx from mecabricks and import them to blender, combine the meshes (joined ...
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396
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How does instancing improve render times with Cycles?
I can understand why instancing reduces the amount of memory used since you don't duplicate the polygons of your scene, you simply reference them from multiple locations in the scene.
From a technical/...
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861
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What's the difference in using displacement map vs real geometry?
For example, I've created a terrain from a subdivided plane. After baking it's geometry to a heightmap and applying that heightmap to a new plane, both planes would contain the same amount of polygons....
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619
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After sleep mode or hibernation blender crashes
When working on projects, I don't close the necessary programs and folders when i want have a rest so that after the rest I can get to work faster. I use hibernation when I go to sleep, and sleep mode ...
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49
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Terrible performance during animation playback
I'm struggling to understand why is performance so bad when I'm editing rig controls or whenever I start the animation playback. My scene is a mannequin character exported from the Unreal Engine 5. I ...
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How do I replicate this series of numbers in my practice project
so I followed this tutorial to make a digital clock and I hit a snag around time 4:07 when I wanted to replicate the numbers displayed in this first screenshot.
I tried to use the 'join strings' node ...
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Does Blender compute all previous modifiers to a Geometry Nodes each time a value is changed in the GN?
Does Blender compute all previous modifiers to a Geometry Nodes each time a value is changed in the GN?
-I mean, for example, if I have a big mesh and I want to reduce its vertices with a decimate ...
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I have low playback frames, even though i have good specs
i am creating this tutorial by Ducky 3D
https://www.youtube.com/watch?v=reUQmtqptwk&t=539s&ab_channel=Ducky3D
i have a gaming laptop with the following specs:-
an RTX 3070 8gb VRAM
32 GB RAM
a ...
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0
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19
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What are some general tips/pieces of advice for speeding up navigation in the 3D Viewport?
I was handed a massive file recently where the 3D viewport struggles to keep up with my mouse commands (panning, zooming, selecting, etc.), even though my machine should have excellent performance on-...
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252
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How to improve performance when rendering freestyle lines only?
I have a moderately complex scene that I wish to render in a "line only" style like blueprints. I've enabled freestyle rendering and stuck with the Workbench render engine given that I don't ...
- 217
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215
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Is there a way to make blender start rendering the next frame before it is finished the current so the GPU usage is constant?
As you can see from this screenshot GPU usage goes up and down as the current frame is finished rendering and the next frame is prepared. Because the GPU is not needed while the frame is prepared the ...
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2
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127
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RAM usage above 3gb with a single character animation. Less than 10fps
Just see for yourself: https://www.youtube.com/watch?v=TRonAc9TJv4
Im using most recent blender version(Ive tried with older versions too). With or without addons, this problem occurs.
Im using a ...
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21
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Delayed reads/writes from external drive from blender 3.4.1
Computer Specs
New M2-8core gpu, MB Air, Ventura 13.2, 16gb ram,256gb ssd.
New external LaCie, self-powered D2 Pro 4tb drive. Rated and verified at 256mbs transfer rates. This is directly connected ...
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505
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Performance issues with high polygon count and memory leak
Good day,
I am working on a Model with a high polygon count, 27,066,816 to be exact. Therefore I am having long loading times when switching between object, edit and sculpting mode.
My goal is to ...
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146
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My old Blender is dead [closed]
I'm currently on Blender version 2.83, and I don't know why, without any sign of problem, I
Can't start it, it crashes instantly.
I looked at the different solutions, everything is up to date, i ...
- 29
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3k
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Why does blender lags when I try to move objects?
I'm using blender version 3.3.1 and when I try to move objects by using the G key on the keyboard, it lags. It goes like "not responding". Also the framerate of the viewport playback is too ...
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162
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blender running slow when deforming mesh with normal map
I have a pretty powerful pc that should run this perfectly but I'm getting a lot of lag when doing this. when I deform anything that has a normal map, it doesn't want to handle it very well and it ...
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6
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8k
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What computer should I buy for Blender? How do I choose hardware? [closed]
I’m using a Mac Book Pro but from what I understand Blender doesn’t work well with any Apple computers?
I’m looking at PC options to use specifically with Blender.
How do I choose a computer to use ...
user92201
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Viewport and render very sluggish but PC is powerful. How can I reduce render time and increase viewport performance?
I have a pre-built NZXT with i-7 12700k CPU and RTX 3070 GPU with 32 GB of RAM. There are a lot of instance objects, cloth simulation with self-collision enabled, a rigid body, and collision object, ...
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45
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Framerate plummets when moving or editing objects
Blender community,
I am suddenly encountering a serious problem when using Blender. When I am simply looking around the scene, Blender runs just fine, at around 60fps. However, when I am either ...
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