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)
374
questions
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8 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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0answers
8 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
20 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
12 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
22 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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25 views
Why is blender running so slow on Ubuntu 20.04.1 LTS [closed]
So I just installed Ubuntu 20.04.1 LTS in hope that blender will run faster. But for some reason startup takes at least 5 secs and framerate is about 5 - 2 fps. Here is my setup:
Ryzen 7 3700x, RTX ...
0
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1answer
27 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). ...
4
votes
2answers
332 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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0answers
45 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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78 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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0answers
23 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
19 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 (...
6
votes
2answers
322 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 ...
0
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0answers
31 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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1answer
30 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
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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149 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
25 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 ...
0
votes
1answer
26 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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0answers
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 ...
0
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1answer
170 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 ...
0
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1answer
25 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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0answers
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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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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0answers
24 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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0answers
24 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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0answers
398 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 ...
-3
votes
2answers
153 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?
1
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0answers
256 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 ...
0
votes
1answer
147 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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0answers
17 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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0answers
19 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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0answers
54 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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0answers
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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24 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 ...
2
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0answers
129 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 ...
0
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0answers
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
48 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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0answers
46 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 ...
0
votes
1answer
84 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. ...
3
votes
2answers
676 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 ...
1
vote
1answer
26 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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0answers
19 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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0answers
134 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 ...
0
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1answer
157 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 ...
0
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1answer
79 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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0answers
180 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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0answers
125 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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0answers
61 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 ...
