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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16 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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16 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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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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304 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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25 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
23 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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22 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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46 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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24 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
25 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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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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74 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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24 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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28 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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23 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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15 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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22 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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168 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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117 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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174 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
90 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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12 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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16 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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53 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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32 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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23 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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98 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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12 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
37 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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45 views

What costs so much perfomance in my scene?

I have an animated scene with imported CAD models. Already upon importing the first model and applying materials to it, the perfomance started to decrease drastically, despite me 'optimizing' the ...
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1answer
55 views

Debugging Rig performance

I have a complex character rig. Its a Rigify rig base, but with a bunch of other stuff i've added, like a custom face rig. Somewhere in the process of building it all, the performance has gone down. ...
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2answers
497 views

How is real-time rendering different in blender from game engines?

Real-time rendering is the key feature of game engines like Unity and Unreal. Although advanced rendering by Cycles should take a while, I think Eevee should be able to deliver real-time rendering. I ...
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1answer
24 views

Animated text body drops Playback FPS by half

I'm developing my first Add-On, its main purpose is to visualize Scientific Data (BlenderNC), I'm using Blender v2.83 (Mac OS 10.15.5, 16GB RAM, Radeon Pro 555 2 GB). As a feature, I want to animate ...
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17 views

Blender on a macbook pro 2015 Catalina with Intel Iris pro and external Monitor bad performance

Blender 2.8.2 performance is very bad with an external Monitor - the basic cube stutters when moving. With the internal Monitor it is ok, with blender 2.97 it is ok. So it seems to have something to ...
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79 views

Blender freezes for 30 seconds every time I click

I wrote one question about its limits. Blender was being cute hahaha. Still, after that scene, Blender is being a pain. I am dealing with the blue dial every click, it last for about 30 seconds, it ...
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1answer
137 views

Blender 2.83 GPU render slows compared to CPU

I am doing animations for over 3 years and i never came across the scenario that GPU render slower than CPU. I m currently rendering a scene and the same scene is being rendered by CPU in 9 minutes ...
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1answer
45 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 ...
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127 views

HP Envy x360 Laptop- Blender is running slow and crashing and I have no idea how to rectify this

I've been using Blender on my laptop for about a day now and I got this far in creating the donut, however the software keeps crashing, freezing and not responding. Would you be able to help me ...
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61 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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45 views

Render profiling in blender 2.8

Sometimes, when I add a shader node render times for a single object are reasonable but, whenever I try to render sets of said object (e.g. tree --> forest) rendering takes up days or even weeks ...
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1answer
101 views

What to choose GPU or CPU , and should I use opencl, Linux (openSUSE)?

AMD ryzen 5 2600 6 cores RX570 vid card. 16 gig ram. I have done allot of research, but can't find what ideally would be the best setting for my system. At the moment Blender says my vid card does not ...
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1answer
86 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-...
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1answer
57 views

Make Video Sequence Editor (VSE) playback in real time? [duplicate]

How do I make the Video Sequence Editor (VSE) playback in real time? I have some 4K video clips that I want to edit, however, I'm unable to do so because when I hit play I get about 2 FPS playback (...
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1answer
135 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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25 views

Are there any optimal settings to take full advantage of hardware when working in Blender?

Just getting started in Blender but do come from a video editing background specifically with Adobe Premiere Pro CC. I have my computer set up so I have my m.2 drive running my source media and an SSD ...
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30 views

Is there any way to prevent Freestyle from wasting time calculating objects that were excluded from rendering?

I love making animations that use high amounts of reflective surfaces, and recently have been trying my hand at Freestyle which is amazingly fun. In my current project, I am trying to make only one ...
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1answer
502 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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1answer
100 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. ...
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47 views

Blender 2.82 viewport and tab selection lag

So I downloaded Blender 2.82 for Windows 10 and right away noticed lag in the 3d-Viewport. Just grabbing and moving the cube was noticeably laggy. Other basic functions like rotation and scaling were ...
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45 views

Does using Eevee with heavy rendering make Blender lag like in Cycles?

I use blender 2.79. When I render really heavy objects blender starts to lag, although my PC specs are good. Does Eevee do the same? I have seen on youtube that it is much faster, but what about very ...

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