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)
457
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Large Grease Pencil File Lagging in Blender 2.92
I have been using Blender 2.92 for a few months (using the grease pencil) and it started lagging a lot on a specific file (0.92GB), particularly on specific scenes. It lags so much that I can’t ...
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Would 1 million faces/vertices be too much for Blender?
I am working on an interior design which might end up with having 1 millions faces. I already have about 40k faces/vertices so far. While loading Blender in solid mode only takes seconds, it takes ...
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how to change temp files from cycles render to be handled on another disk drive?
I have a small C system with 14 gb left but three more disks with over 300 free space each, and yet when i render with cycles the space for the files to render is taken from the main C drive, how can ...
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Python API : Which alternative to 'collection.objects.link' for many objects?
I have generated objects to add in a collection using a python script.
When adding about 3500 objects, I have performance issues : it takes about 0.5 second to run ...
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728
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Since Blender 2.90, the program has been very slow to start up
So ever since Blender 2.90 came out, and with the following updates of 2.91 and 2.92, Blender has been very slow to startup... At least more than 30 seconds, probably closer to a minute. Blender ...
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5
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How much better would blender be if I upgraded my Ram? [closed]
I currently use AMD A6 5200 APU processor, with linux (Zorin OS 15) as operating system. I have 4 GB of ram. I can run blender 2.92 at a good speed however it does slow down when I have over 4000 ...
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Settings to make viewport playback drop frames in order to keep up with actual animation speed?
I'm animating a character in 24 fps, but my computer is only able to playback at 20fps at the most in this scene, so when I play the animation in the viewport it's actually much slower than it should ...
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129
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blender crashed twice during long render, how to detect and remedy reason for crash?
I am brand new to Blender. I'm running Blender 2.8 on Ubuntu 20.04. I've been working through an explosion tutorial. I have a simple-but-glorious explosion using only a single emitter and I've been ...
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230
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Which gives better performance in render/viewport: mask modifier or assinging a transparent material?
I have a character model where a good portion of the skin is covered by clothes. To prevent the skin from clipping through the clothes, I assign a transparent material to the areas that aren't ...
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122
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Graphic card performance impact on baking light
This question might be a bit of topic but currently im using a computer with a Geforce GTX 1060 6GB graphics card.
Baking the lights of certain meshes with 10k samples can take up to 8-10 hours for me....
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395
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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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227
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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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561
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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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131
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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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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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505
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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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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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926
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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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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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903
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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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426
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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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543
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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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335
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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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661
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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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47
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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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1k
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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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79
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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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37
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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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2
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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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114
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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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51
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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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250
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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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2k
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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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467
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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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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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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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148
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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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147
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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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528
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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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510
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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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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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597
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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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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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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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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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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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238
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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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451
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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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657
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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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655
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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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