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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18 views

Blender keep crashing, how to properly report? [closed]

We switch last 2 month completely from 3Ds Max to Blender only. We are very excited, but all our computer somehow keep crashing once in a while, we dont know why or how to track down this problem. ...
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26 views

Viewport performance worsens the longer Blender is open [closed]

Problem: As Blender runs, viewport performance degrades. This performance degradation is irrespective of complexity of scene. This issue is affecting my work on my laptop, which has modest specs, but ...
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I installed blender 2.92 (new user) when I launched it it showed a blank screen with not responding at the top [closed]

I'm a new user Installed blender version 2.92 this morning It launches the shows a blank screen with an header at the top like this Blender (Not responding)
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12 views

Sculpting armatured object requires switch to edit mode to see result

Using any brush on the armatured high poly model requires 2xtab (edit mode -> sculpt mode) in order to see the stroke. The problem is new (could sculpt the high ...
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1answer
29 views

Performance of editing/sculpting

I have some performance concerns regarding moving vertexes in either edit or sculpt mode. blender seems to handle editing better than sculpting. At around 20k triangles sculpting begins to slow down. ...
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47 views

Internal recording from camera 3D in Blender, is it possible? [closed]

by chance in blender is it possible to make an internal recording from a 3D camera located in position ''x'', for the performance of the activity in progress? He is then able to exploit the shot for ...
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1answer
40 views

System is Slow when using booleans [duplicate]

Just started doing some of Blender Tutorials and was wondering why things are slowing down. Not things like pan and orbit, they're fine . But moving booleans around is painfully slow. Like when you ...
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24 views

Cycles Render in viewport extremely slow?

I have two 2080 TIs (both are checked on in the system settings), but cycles takes minutes to becone visible enough through the render noise to see my scene. This doesnt seem right to me....is it, ...
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1answer
32 views

Blender is Lagging Suddenly

I just started using blender yesterday. I have been following Blender Guru's donut tutorial, and I have gotten pretty far, but now when I try to sculpt, I can barely see the effect, and when I start ...
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1answer
30 views

Speed up I/O when using cached simulations

I'm experimenting with fluid sims, so I've been baking and rendering the whole day. One thing I've noticed is that the I/O seems to be really slow. Like really slow. I'm only rendering at 30 samples ...
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80 views

Edit mode 2.91 very slow and cpu intensive compared to 2.79

It took me a while to move over to the new Blender version. Got my hotkeys changed and activated my favorite plugins. What I noticed is with relatively low poly objects (100k) the edit mode is ...
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55 views

Grease pencil unusably slow

I'm trying to use grease pencil to do some animated screencasting-sort-of videos. I've used it before to do quick animations and noticed that even with a dozen or so vertices the performance drops. At ...
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15 views

Blender crashes constantly

I use a 2018 15-inch Macbook Pro with a Radeon Pro 555X 4 GB graphics card, and Blender crashes constantly. Even the simplest scenes. Like just now I had just started modeling a bowl with a single ...
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11 views

Big lag while Sculpting fine details

I've tried sculpting fine details with alpha maps but it always lags so bad. I've used Dynatopo with constant detail for it which works at first, but then the poly count starts rising and everything ...
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30 views

Blender was running fast then randomly became extremely slow to open

I had left a blender file running for a couple days in the backround and went to open it and it wouldn't pop up, so i ended the task. When i went to open blender again it took 5 minutes to open and ...
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14 views

Freezing While Selecting Joints

I'm working on a rig for a pretty simple character - only about 70,000 tris - and Blender keeps going into (not responding) mode every time I select a joint. It resolves itself eventually, but that ...
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1answer
25 views

Blender crashed computer while baking cloth animation

So I'm following this Tutorial: https://www.youtube.com/watch?v=gFOJ7ul19AE&ab_channel=Ducky3D I'm following exactly as the video, the only difference is that I'm using an Skull instead of the ...
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1answer
30 views

Do invisible polygons influence rendering time using Cycles renderer? [duplicate]

TL;DR The number of polygons has negligible impact on rendering time. I'm having a furniture designed part by part using FreeCAD and exported as Wavefront OBJ (following Tutorial Render with Blender). ...
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2answers
347 views

New install of Blender; extremely slow when panning a video

I have read a lot of posts here and on other forums about Blender being painfully slow, to the extent it closes in on being unusable. Here is my scenario: I have a 11 second 4K video (30 MB file) ...
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11 views

Object turning flat grey in rendered view [duplicate]

hello guys. I'm having problem using render mode on blender on any file I've. The models are not displayed correctly on render mode, not on this file,the problem persist on any file. Cycles or Evee ...
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70 views

2.91 viewport lag after certain amount of time

When I open Blender it runs perfectly smooth, but after a while it begins to lag. I close and open the same file and it runs smoothly again, until about fifteen or twenty minutes pass and it starts ...
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129 views

Blender very slow/unresponsive

I tried to search similar topics to no avail. I am a fairly new user to blender. I have been using and learning the program for 4 months now. Blender has been horribly slow to the point that i can get ...
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28 views

Blender performance not improving when disabling viewport physics but does when deleting it

I'm having a very simple problem. I'm using dynamic paint to create ripples on a plane mesh. Something perplexing is happening; when I disable the Dynamic Paint viewport icon (so that it will only ...
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24 views

Shrink-wrap modifier causing heavy lag to the parent mesh

Following a tutorial for Blender 2.79. Yes, I know. I'm trying to model a Dodge Challenger, and I used a shrink-wrap modifier to more or less "attach" them to the parent, or target mesh (...
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2answers
323 views

Need Technique for Projecting Countries onto the Earth

I've got a project I'm on where I must project some shapefile generated country surfaces onto a globe. Here's where I am currently... Now, the shapefiles I used have excellent vertex resolution about ...
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34 views

Blender performing very poorly

I'm trying to follow the tutorials, but the program is freezing up and lagging very often and very severely to the point that I can't do some of the steps of the tutorials such as sculpting because I ...
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1answer
36 views

Super Laggy when moving vertices, in edit mode, where it shouldn't be laggy

I'm a new modeler here, and its been pretty smooth, until now. I have been working a Dodge Challenger for the past couple of weeks, with almost no speed bumps or anything. With subsurf, The total ...
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24 views

How do I get viewport FPS higher when using image sequence as plane?

When using a high-res (4k) image sequence plane in Blender, the eevee viewport FPS tanks down to an almost unusable rate, despite there being just one plane in the project and my hardware being ...
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161 views

Will Intel I7 4770K bottleneck RTX 3080 when using Blender?

I know that in some cases (for example some games) CPU can be a bottleneck for GPU. I'd like to buy RTX 3080 but I wonder if I'll be able to use It's full potential in blender on my current PC. My ...
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26 views

playing with View Layers - are they always all rendered?

I'm playing with View Layers since I have to separate a lot of stuff from a scene. It's working great but I was wondering how it does impact the render performances. If I have, let's say, 10 View ...
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1answer
28 views

How to get image in real-time? [closed]

It doesn't matter if it works like a capture or if the quality is very low. There's no reason for shadows or light, too. I hope to get only materials' color and shape of model. Just i want real-time. ...
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9 views

Same file, slower FPS baked data playbak in weaker computers

When playing back a fluids simulation on the 3d viewport (just the simulation. No mesh, no lightning. Just the baked data): I get low FPS on my beefy PC, while I get better FPS count on other machines ...
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1answer
264 views

How to prevent Blender from crashing when running out of memory?

I'm waiting for like 5 minutes for a render to start, nothing happens (Blender 2.90.1) and Blender is crashing in the end. I already tried to render the project using Blender 2.83.8 but I'm getting ...
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1answer
27 views

Are there downsides to increasing viewport samples?

By default the viewport samples are 32 (at least on my machine). This gives me a rough render fairly quickly when the viewport isn't changed. But are there downsides to increasing this number? ...
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29 views

WilI always more cores and threads translate to better performance in blender? [duplicate]

After writing I guess a 3 page essay describing my problem and after about a year of inactivity on stack exchange I remembered to sum up my problem, so please if you need more details tell me in the ...
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24 views

Videos from my cell phone have slow playback in VSE preview

Usually when I drag a video from Zoom or my Cannon camera, the preview will play back at full speed. However, when I drag in a video from my cell phone, it only gets ~3 FPS. (Interestingly, the video ...
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29 views

How to overcome odd lag in texture painting mode?

My first post here. I have just recently started to use Blender (running the latest version) and was working on some very easy tutorials today. I'm suddenly stuck at the texture painting part since ...
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29 views

PC freezes while handling Multires high poly scenes before VRAM is fully used

I'm somewhat new to Blender, and lately I've been trying the new Multires for sculpting high detail poly models. From what I had seen online I was under the impression you would be able to reach very ...
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573 views

Blender 2.9 instantly crashes when I try to render in Cycles

Blender 2.9 crashes instantly when I try to either render the viewport in cycles or when I try to render the scene in Cycles. My computer: Mac Pro early 2009 OSX 10.13.6 High Sierra 3.33ghz 6-core ...
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2answers
178 views

Does CUDA matter for Blender performance? [closed]

Does CUDA matter for Blender performance? What about CUDA and Cycles performance? What about CUDA and Eevee performance?
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293 views

1 Nvidia 3090 or 2 Nvidia 3080s for a 3d workstation? [closed]

Currently I'm running very large scenes for particle animations / simulations. I'm particularly concerned about the memory management distribution of the 2 3080 gpus approach for these very memory ...
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1answer
198 views

Poor Undo Performance: Blender 2.9

I'm having issues with Undo locking up Blender on the first undo action following some action. This happens whether I remain in one mode, or on one obj. Basically say I rotate a joint and I don't like ...
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19 views

Edit mode performance problem with using n

I'm not entirely sure what caused this, but I was playing with a point light and the Eevee settings for shadows. Then I did an indirect lighting bake but deleted it afterward. More I can't remember. I ...
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21 views

Driver to Texture Animation Playback Slowdown

My Animation playback speed in OpenGL 3D view (solid mode) dropped from well above 25 fps to 0.3 fps. As it turns out, the reason is a Driver added to a texture used on a huge number of objects. More ...
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56 views

Script performance issues. Applying modifiers to mesh with shape keys

I didn't write the script, I can read it, but can't do much else. This script is used for applying subdiv to a mesh with shapekeys, while preserving the latter. However it seems to be leaking a lot of ...
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39 views

Utilize more threads in viewport

I've got a threadripper 3960X, which is great for rendering. However, when I have a large scene and am moving around in the viewport (no animations or anything, just a ridiculous amount of verts) it ...
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28 views

Slow fps on animation playback, even without modifiers in solid mode

In Blender 2.83, I'm getting extremely slow playback speed on animations. The fps is at solid 60 before any keyframes are added, but as soon as just a single keyframe is added the fps plummits to ...
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159 views

Blender too slow for my new computer?

I just bought a new computer and I was following the donut lesson of Blender Guru. When I raise up the number of subdivision of the donut (Viewport) to 3, the problem starts. I can not smoothly move ...
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14 views

Slow execution and options not available RTX nvidia

Blender GIS 2.83. 1) I cannot find the setting for GPU. Mine is nVidia RTX super 7000. 2) This and other settings for cpu and gpu, I cannot find them in Preferences/System. Surprisingly slow: I have a ...
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1answer
56 views

Will applying Decimate Modifiers speed up Blender?

I'm working on my first big paid project and I'm coming across a lot of problems. I'm not sure what Blender can handle, but my project was something like 6 million plus faces. I'd simply click a ...

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