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)

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M1 MiniMac running slow! Anyone have suggestions? [closed]

I have two identical M1 Mac minis. Blender runs great on one but very slow on the other. I have M1 options checked in the preferences. V 3.1.2 is the slow one. Not sure which version the other is... ...
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When sculpting low poly, the performance goes down. I need to stop an wait

Still trying to learn this product. I am now learning about sculpting. Following a training, using a low poly head provided for the training I am sculpting. Using any brush in ViewPort/Shading, I make ...
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Running Blender as command-line has a long warm-up phase

I am using Blender 3.1 and want to export a .blend file. I am calling Blender through its CLI with the following command: Blender.exe --background --no-addons -E ...
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Optimization, program is lagging

What did o do wrong? I can't work Blender is lagging. I turned off shadows, lines and etc. but it's still lagging. How i can optimize my work process? Tree, house, wood and rocks i made in sculpting. ...
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Adding objects to the scene quicker

I have the following script, which adds 628 cubes to the scene. ...
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Is there a way to reverse dope sheet frames for a reversed animation?

so I made this figure and make it dance for around 230 frames. The problem is that I need more animation time to film longer with the camera, therefore I need more frames. The animation jumps back to ...
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How do I fix fps dropping in playback? Version 2.78

If there is anyone still using the old versions of blender I hope you can help me. Basically my animation playback is stuck on 8-9 FPS since idk. It was playing without any problems on 30 FPS and one ...
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Making planes with image sequences run smoother

I'm working with both audio and video and I can't help but notice that when you add in a plane with an image sequence as a material the viewport fps' drop a lot. Now I do have several planes with ...
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How to debug low FPS with empty viewport?

I'm working on a big scene. From one point I noticed a drastic change in the viewport performance. To find out what was draining FPS I tried to exclude every collection from the layer and all the ...
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Eevee is not using full CPU power when compiling shader in Blender 3

I'm currently following a texturing tutorial in which I end up making a big and complex node tree. I just got a new GPU and Cycles is running like a charm with GPU acceleration. In Eevee there is a ...
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Blender 2.x and 3.x start takes several minutes

I´m using blender on different machines. On my private device it´s running and starting without problems. On my company device it´s starting super slow and takes up to 2min to start. Once blender is ...
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Can you optimize Armature performance in Blender?

My scene contains one character model from Street Fighter V, and I get around 5fps. It's strange, since I can easily run that actual game at 60fps, but I suppose there are reasons Blender would be ...
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Blender frequently stops responding on default cube (but sometimes allows normal use)

Not sure if this is the right forum - I will move this question if you tell me where to go (as it were!) I'm running blender 2.83.19 on Win 10.0,Build 19043 I use a Dell laptop with Intel Core i5-...
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What's the fastest way to render a scrolling text?

I'm trying to render scrolling text (well, in 2.79, because I'm outdated) I tried rendering ordinary 3D text and it took about 2+ seconds per frame. So I tried rendering the text to an image 1920 x ...
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How to stop blender from slowing down web browser while in cycles viewport?

I'm trying to follow tutorials, but whenever I have the blender window active, youtube slows down to a point where the audio starts studdering and the video stops updating. I know blender generally ...
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How to disable cloth simulation for performance?

I have a character with a simple cloth sim attached. This causes a lot of slowdown when playing the animation. Simply disabling the realtime display does nothing to improve this. This makes animating ...
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How to disable modifier calculations while in edit mode?

I'm working in a project with many boolean modifiers, so the performance when I edit a mesh (that is affected or affecting by all these modifiers) completely freezes my computer for several seconds ...
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What is the performance cost of adding a SpaceView3D draw callback?

In the conversation in comments to Driver based on shading types/ change boolean when switching shading types an argument has been made that the draw callback is called very frequently, and therefore ...
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Performance issue - Blender PC requirements

I am a beginner so I am working with a simple model in Windows 10 pro. I started working on a 2-3 year old intel Desktop with 32Gb RAM and integrated GPU and HDD. Blender 2.9x. The initial designs ...
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Sculpting brushes are lagging after a while of sculpting

I just imported a character from ZBrush to Blender and after a while of sculpting I encountered a problem: the brushes started to lagg like 1/2 sec and the thing is that the character has around 2.6 ...
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v3.0 not using dual GPU's, 2.82 does (same exact file) [duplicate]

I've always used 2 GPU's in blender and it's always rendered 2 tiles at a time. Not anymore... I recently updated to blender 3.0, after about a year of not using it at all. On rendering my first image ...
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How to increase FPS? (UPBGE)

I'm nearing the completion of my game, but I've noticed that average FPS on my gaming PC is 30FPS, which makes me think that on regular PCs it will be unplayable. 1)Any general ideas on how to ...
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Blender freezes every few seconds in specific scene

Originally problem appeared on Blender 2.93, but today I switched to 3 exactly hoping that there all will be fine, but, the problem is still here. I have been experimenting with creating city terrains,...
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Performance impact with complex procedural materials vs image textures?

This is a topic that is somewhat important to me. Let's say I create a complex procedural material with several procedural textures. I could either leave the material as-is, or I could bake it onto a ...
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Is there a way to increase armature performance on a high-poly character for sculpting?

I am attempting to sculpt some corrective shape keys on my high-poly character, however the armature is seriously impacting my sculpting performance. I have attempted to migrate my character to ...
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I have 32 gig of ram and blender 2.8 becomes sluggish and jittery and becomes unresponsive when I load a scene with 3,332 objects and 1.4M triangles?

I have 32 gig of ram and blender becomes sluggish and jittery and becomes unresponsive when I load a scene with 3,332 objects and 1.4 triangles ? I forgot to mention there are over 900 armatures in ...
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Unexplained Unresponsiveness on Very Powerful Machine

I've got a pretty large blend file (~2GB), containing a couple objects with large meshes. On my home computer with Blender 2.9, the UI is perfectly responsive in object mode. I have a access to a ...
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Dual GPU doesn't speed up rendering in Cycles

A few days ago I finished a build, including two Titan XP. The goal was to get faster rendering, letting the gpus work as two seperate cores that render two chunks at the same to nearly double the ...
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blender UI locking up

I am using blender 2.93.107.0 to model a chess set and board. I added a panel to use as a board and applied materials. Now, it locks up almost immediately after opening the blend file. I have ...
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Experiencing Lag With Blender

Issue I've experienced lag when viewing in the viewport window, selecting objects', and moving selected objects'. Attempted Solutions: Adding more computer RAM (previously 8gb, now 64gb) ...
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Is it possible to bake physics parallel on multiple blender instances? [duplicate]

Example cpu with 8 cores animation with 16 frames one fluid physics domain It takes 32 seconds to bake the fluid physics cache frames 0 to 16 Can I decrease the baking time to 16 seconds by baking ...
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Blender selection in viewport suddenly slow (68 faces)

I have been working on this .blend project for a couple of week now, and suddenly, I noticed it became SUPER slow. I pinpointed that the drop in frames happens when I select a new object and try to ...
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How can I speed up my render times in Eevee?

I started learning Blender this past July and I have fallen in love with it. I've felt very accomplished by all that I learned myself, so I decided to start a project related to my job. Since I had 5 ...
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Is it a bad idea to have multiple smoke domains?

I have this scene with 3 smoke domains, each with different properties. Whenever I try to render in cycles, it crashes. I'd like to know if using multiple smoke domains is significantly more demanding ...
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Open and edit Blender file without any viewport or depsgraph updates?

I just accidentally saved a file in a state that causes Blender to use up several dozen more gigabytes of RAM than I have when I try to open it again. I know exactly what went wrong. If I had BPY ...
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Slow subdivision performance

I'm trying to model a pill bottle top but I'm experiencing really slow performance when using the subdivision modifier. I have a Legion 5P with AMD Ryzen 7 4800H, Nvidia RTX2060 and 32GB RAM running ...
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How to fix potential lags while sculpting?

How does one fix sculpting lags in blender? I finally found the main culprit to why even super low poly count objects lag while sculpting.
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Slow lagging Blender

I'm fairly new to Blender. I'm working on a sculpted character. Since I have started using the dyntopo and resolution I get the wheel of death at almost every command! So I can't really continue! I'm ...
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Has anyone figured out a way to mitigate the slow down from Line Art modifiers?

The documentation states that this is going to change in the future, but as of now, each Line Art modifier calculates the occlusion of the scene independently so multiple Line Art Modifiers are ...
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3 votes
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Performance ?, which is better, taking a 4k image and splitting it up, or using material with full 4k image and changing the texture coords?

I have read variations of this question in the past, but often times those questions had more to do with how to also split up a model, and this variation does not. I have a set of 4k PBR textures (...
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Call a function that prints the name of the node that the user is changing a parameter on?

What’s the most performant way to call a function every time a user changes a parameter on a compositor node (even if the node isn't selected), and get the name of that node in the function which is ...
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CUDA Illegal Address

Hi I have recently just installed Blender 2.93.0 onto my work PC. I have a file that has my models and scene setup on Google drive, where I launch the file from. I have selected GPU Compute and I am ...
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How to get blender to open a specific internet browser

I am using Waterfox as my browser. It is my default browser in my settings and all my file associations are set to Waterfox as my first choice. Despite this blender always opens internal internet ...
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Slow Workflow with RTX 3060

I am quite desperate, because I just bought a new laptop (XMG CORE 17 - E21qzj FHD i7 16GB 1TBSSD RTX3060 W10H) and I tried to adjust all the settings, but it is just so slow. Right now I am trying to ...
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Is Freestyle this slow?

Rendertime is 1 min 35 seconds with this chair (60 k vertices) occluding the figure. Without the chair it's .3 seconds of render time
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I'm experiencing severe lag and long delays for pretty much all actions

So I just installed Blender today, and the problem didn't start till about 2 hours into my first donut tutorial attempt. At first everything felt fine and responsive, but as I got further along ...
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Is it dangerous leaving PC Rendering overnight? [closed]

Not actually a blender issue, I’m rendering in Cycles using Blender and the animation is quite long, I started rendering 13 hours ago and it’s not even at half animation. So, since it’s a job that I ...
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Terrible Lag with similar vertice count as project that runs fine [duplicate]

I have two blend files, both have around 170k vertices, but for some reason one works perfectly fine when modeling, while the other one has massive lag. For example I try to move a small part of an ...
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Laggy viewport in 2.9 when model has a lot vertices

I an trying to figure out why blender can be super laggy and slow on my high end pc. The lagg only happens with certain objects. probably because it has a lot of vertices (248k). If I go in edit mode,...
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Blender keeps freezing

I am new on blender, and I seems to have one really annoying problem. I thought my PC is pretty good but seems as I am not right. i7-8700 CPU @ 3.20 GHz 32GB RAM NVIDIA GeForce GTX 1060 6GB and my PC ...
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