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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6answers
16k views

What are the pros and cons of using Blender on Windows or Linux?

Is Blender more stable on some Linux distributions, or just on Linux at all? I am contemplating dual-booting my computer and partition some of my HDD for Linux to use blender there. Would there be any ...
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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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0answers
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
27 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. ...
1
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0answers
46 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 ...
2
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1answer
397 views

Performance: Eevee vs Blender Internal

In my application I use Blender's Internal rendering engine (headless mode) to render quick mock-ups of various items. BI yields plenty quality, however speed is essential (it's a web app) and I wish ...
2
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2answers
285 views

Low FPS Blender(viewport)

Started using blender, FPS was great, but the UI was flickering. Googled, I didn't have an opengl32.dll in the directory, then added it. UI Flickering gone, but FPS dropped drastically. Would like ...
0
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0answers
23 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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0answers
58 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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1answer
30 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
29 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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0answers
53 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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4answers
6k views

Slow sculpting on high density meshes

iv'e seen people sculpt meshes around 5 mil verts with no lag whatsoever, but everytime i come close to like 1m and above the lag starts to be noticeable and soon any sculpting becomes unusable. Im ...
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0answers
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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1answer
330 views

My rig performance is so slow! Hide Geometry in a referenced rig?

I have quite a long project ahead of me and made my own rig, model etc. The retopo is good, the rig not too heavy and I have a fairly good computer, nevertheless while animating I just can't get over ...
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0answers
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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0answers
29 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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0answers
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 ...
1
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1answer
23 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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0answers
159 views

Heavy Boolean Operations

I was wondering why boolean operations are hard to compute for pc, ı got one desktop and one laptop , and uses 2 different operating system , but in all systems stiuation is the same. I am using ...
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1answer
392 views

LOD in particle systems

I've already checked this two questions but neither solve this problem: Level of Detail of Particles System? How to access data related to individual particles? Both posts derive to use animation ...
0
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1answer
29 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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1answer
147 views

Is there a way to limit the number of CPU Cores used for physics baking?

Is there a way (in Blender) to limit the number of CPU Cores used for physics baking, like you can with rendering?
1
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1answer
3k views

Is there a way to determine why Blender is running so slow?

I have a pretty large project (about 1GB, 4 scenes) and recently Blender has become too slow too use. A couple of annoying things, other than just lagging are: I can not scale or move objects with ...
4
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2answers
344 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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0answers
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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0answers
66 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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1answer
99 views

Rendering on CPU vs GPU how to enable CUDA and performance on older system

I am on an older system, Windows 7, it is built on an Asus Sabertooth X58, I am low on RAM @ 4GB , CPU is an Intel I7 950 a Quad core @ 3.07 GHz, graphics card is a Geforce GTX 460 , boot drive an OCZ ...
0
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1answer
258 views

Lag when viewing meshes in texture shading mode

I've been working on a ps1-style model, very low poly, and was UV mapping some textures onto the mesh, but when I tried adding another texture, the viewport started lagging a ton. I could still move ...
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1answer
90 views

Issue with Collada export on Mac OS Catalina

did any of you experience a problem with Collada (.dae) export of bigger files? I have a blender project with a number of animations (11 MB in total). I've recently updated Mac OS from 10.14 (Mojave) ...
18
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5answers
28k views

How to configure blender so that it uses only 50% of total CPU when rendering?

I need to render a very computer-intensive scene using cycles and for some reasons, I decided to use my home computer (i5 3.30 Ghz, 10 GB RAM, 2TB Hard Drive) to render it. However, the problem is ...
1
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1answer
218 views

Adaptative sampling on Cycles

I have a scene I want to render where a small object moves across the camera's field of view. The rest of the scene is just a black void containing absolutely nothing (see image below). I need to ...
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0answers
125 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 ...
0
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1answer
492 views

Why is my viewport frame rate so slow?

My pc has a CPU- Ryzen 9 3950X GPU- Quadro RTX 5000 RAM- 124 GB of G.skill Trident Motherboard- Giggabite Aorus x57 SSD- Samsung 970 Nvme M.2 1TB in it. But, when I use the "Grassgwald" add-...
6
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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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0answers
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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0answers
23 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 (...
0
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1answer
35 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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0answers
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 ...
0
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0answers
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 ...
0
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1answer
592 views

How to troubleshoot Blender 2.83 crashing

I’ve just added a GPU to my system in the last few days that has allowed me to upgrade from 2.79 to 2.83 YAY!!! A few times while rendering though I return to my computer to finder Blender has shut ...
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0answers
157 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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0answers
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 ...
3
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1answer
311 views

Render is much faster when laptop is plugged in and charging

My laptop seems to be rendering infinitely faster whilst charging then it does when it's not charging for some reason. My setup is an i7 9th gen w/ an RTX 2060. I'm rendering using OptiX. As can ...
0
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1answer
163 views

Animation nodes performance

I've been messing around with animation nodes to influence materials in an array of 1500 cubes, creating a simple motion graphic from a simple node tree. I've attached the blend file for reference. ...
0
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1answer
27 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. ...
0
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1answer
79 views

sculpting is slow on high dpi display

I was about to learn sculpting in blender, and I noticed it's very slow. Just the sculpting. Navigation and everything else is very performant. I tried scaling the blender window so it's 1/4 of my ...
0
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1answer
79 views

Blender does not start

Installed Blender on a machine with Core i7 CPU, 16GBs of RAM and an NVIDIA GeForce 650. I managed to run Blender twice. On the third time nothing was shown and Blender didn't load properly, even ...
1
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1answer
517 views

Slow Playback of mocap data

I downloaded Animations from mixamo to import into my scene. In the mixamo webapp the animation plays back at 100fps. In Blender 2.8, its 7fps. Solid mode, no modifiers, no materials. No other ...
0
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1answer
237 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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