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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NVIDIA settings for Blender

Just wondering if anyone messes with their nvidia settings for Blender or do I just toggle "preferred maximum performance" and be done with it? (Running on GTX 1060 6GB)
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low framerate and crashes in the viewport by using not even up to 30% GPU and CPU

Hello im new in blender and wana ask is that normal by my PC that it this scene if i play it for the first time i got 1 to max 15 fps . And my GPU and CPU usage is not even by 30% . And if i for ...
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Desktop GTX 1070 barely faster than GTX 1050-Ti mobile in cycles

I'm rendering 10 frames of a scene both on a Dell XPS 15 Notebook and my Desktop PC. Desktop: i5-2500K + GTX 1070 8GB Notebook: i7-8750H + GTX 1050-Ti mobile Desktop: CPU (i5-2500K): 2:34 min GPU ...
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Intel optane, does it have any benefit in Blender?

I heard Intel optane has benefit in 3d application by making them load faster and other benefits include 3d modeling. Blender already loads faster than the other 3d applications I use and we have the ...
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Super long transition from one frame to another in Cycles' rendering animations!

I'm rendering a 4 minute animation that's AV-synced to my new song. So far, I have followed pretty much all possible my Cycles rendering, namely increasing the Tile Size for GPU Compute, lowering ...
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Blender 2.8 cannot save document, or cannot re-open a document (sculpting) and crashes my whole computer

I run Mojave 10.14.6, 8 GB My downloaded Blender 2.8 from the blender 's website two weeks ago. It seems rather random. In sculpting mode, some files suddenly won't save. Instead the program freezes ...
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26 views

Sculpting bad performance

I have an AMD Radeon RX Vega⁶⁴ graphics card and is experiencing slow performance while sculpting. Is there something wrong with the graphics card, or a bug in Blender? This just seems really odd, ...
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One of my Sculpting files is crashing Blender when I try to open it

My Blender 2.80 (2019.07.29) worked beautifully until last night. It froze each time I tried to open one specific file (in Sculpting). It was big, but not the biggest (which keep opening fine). The ...
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how can i improve script execution time

Is it there a control or something to assign more resources to script execution. Or the only option is to improve script's code performance?.
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30 views

Blender 2.8 general frame lag

With the recent release of Blender 2.80, I was expecting it to be as polished and lag free as 2.79b I guess I set my expectations a little too high cause I'm disappointed it still feels like it's in ...
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No render speed difference in Eevee cpu vs gpu

My gpu got damaged last night so I removed it and started using blender with cpu only. I found that there is no difference in render speed or performance between cpu vs gpu. 2 second per frame on cpu ...
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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 ...
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Blender file taking over an hour to load, is this normal?

System spec: Threadripper 12 core, SSD, 32GB RAM, 2080ti File details: 40MB .blend 10 million verts in a curve. File creation details: Curve created via importing of a very large and complex SVG ...
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Blender for competition? [closed]

I am in a competition. I am literally 2 weeks into game dev, and rarely use Blender. I normally just use it for a brief tutorial, and if it works, it works, if not, I just forget about. So the ...
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Saving blend-files straight to server nets 0.5% speed of a windows file copy, how to fix?

Some context: Part of our company (about 3 fulltime people) do ArchViz, we're using Blender 2.79b and are transitioning to Blender 2.8. Tests underneath were done using 2.8. I'm not an artist myself ...
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85 views

AMD RX 570 GPU slower rendering than NVidia GTX 1050 Ti?

I recently built a new PC running on a Ryzen 7 2700X CPU and AMD Radeon RX 570 GPU. However, I'm getting significantly longer Cycles rendering times than my old Intel i5 PC running on an older NVidia ...
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16 views

Collection instances are just like prefabs?

I wonder why unity can load for instance 100 000 objects ( prefabs) and handle them inside the viewport quite well, while blender struggles to even move just 10 000. Would it be easier for Eevee if ...
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Cycles: Build without SSE and AVX

I am trying to benchmark Cycles performance without SSE, with SSE only, and with AVX instructions. I am finding weird behavior where if I switch off the "WITH_CPU_SSE" flag in CMakeLists.txt, the ...
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26 views

Texture Painting stuttering

i am having an issue where whilst I am painting (on a new layer, effecting Alpha) the stroke is very 'bumpy', and stutters. I have attached a video to demonstrate. I'm in Look Dev in the video, and ...
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45 views

Sculpting Performance Workflow

I'm new to Blender and using it to sculpt a character. I have been using Dyntopo for the majority of the mesh up to the point where i got to maybe 1 mio vertices, where I have started to subdivide the ...
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74 views

What does tile size actually affect?

Besides the obvious you see is the blocks you see when rendering, I see it changes the size of the samples and from tips and testing it can affect render times, typically higher size (eg 256x256 ) on ...
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2answers
32 views

Render times changing over course of render

I started rendering an animation in cycles in the late after noon than went to bed with it rendering rendering at around 25 sec per frame (when tested at what should of been the most labor intensive ...
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1answer
33 views

Is a large UV map heavy on performance while playing?

I have a very large UV map for a house of mine. Due to the nature of the shingles being single duplicated objects, I have quite a giant UV map when exporting and importing for Unreal Engine 4. Does ...
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1answer
51 views

Tips on reducing Polycount in Scene

I have a problem. There is a lot of figures I created for an art project in my school. I used UV Spheres as models and smooth shaded them. In the end I had 35 million vertices and as you can see ...
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1answer
161 views

Slow Performance When Changing Object Data [2.8]

I'm not sure if it's the object data actually, but I couldn't think of a better way to phrase it. Whenever I ctrl+z, change materials, open/close the file, make or change collections, etc, it takes ...
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167 views

EEVEE render not using GPU fully

I am rendering PNG RGBA frames in EEVEE of a camera fly over a historic building modeled in Blender 2.80.74. PC specs: i7 with 20GB, 1Gb SSD and a GTX 1070 & GTX 1050. EEVEE uses only the GTX 1070....
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36 views

Is the File too Big or is Blender too Slow?

I am just now getting involved in photogrammetry and as we know the files are quite large. I am importing an .OBJ file from Meshroom and from the import to any other click there is lag. Being new I ...
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71 views

Cycles Render CPU Usage Low with Dual Xeon

low CPU usage on Dual Xeon (128GB RAM) when rendering "blenderman" using command line and Cycles on Ubuntu and Win10. Using latest 2.8 build. Single i7 3rd Gen gets upto 100% using GUI and CMD on ...
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Blender VSE slow regarding PC Capabilities [duplicate]

I am quite a newbie at Blender (v2.79b) and I noticed something disturbing while generating videos. I have 8C/16T, all the raw materials are on SSD and I can only see 1 core working on my machine with ...
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67 views

Animation Nodes slow performance

I've just started playing with the add-on and created some simple tree to generate tiles but the it works very slow. Currently I have weak machine and the procedure may not be super optima but even ...
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24 views

Blender 2.80 crashing when I try to open it?

I have installed blender 2.79 before but when I try download Blender 2.80, unzip and try to open it it's just closes like crash without say anything or any error. When I tried to uninstall the last ...
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32 views

Grease pencil in Blender 2.8 Eraser freezing

In my last works I encounter troubles with rubber/eraser, it is working like games on low fps. My current project has 168k points and 1,3k strokes, I remember I had bigger paintings, and everything ...
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1answer
67 views

Can Cycles take more samples at object borders?

Can Cycles be coaxed to cast more rays in pixels containing a large gradient/discontinuity in depth (or high contrast in brightness)? My scene is fairly simple (effectively an image mapped to a ...
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2answers
464 views

Very bad performance on Cycles OpenCL using Ubuntu 18.04 and Radeon VII

We've got a new render machine for our Company. Threadripper 1950x + dual Radeon VII + 64 gb of ddr4-3200 RAM. (Only one Radeon installed now for testing) Our CPU testing went flawless. With great ...
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83 views

Is Static / Dynamic BVH still present in recent builds of 2.79?

There still is Static / Dynamic BVH dropdown in official 2.79 build: That dropdown to choose between them isn't present in recent builds of 2.79 or 2.8 anymore. Viewport resolution only seems to be ...
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41 views

What's the most lightweight format for textures?

I want to know what's the best image format to use on textures that consumes the least ammount of VRAM during render. I'm trying to render a scene in Blender 2.8 EEVEE but because of the textures, ...
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27 views

Viewport animation just tanked to 3FPS out of nowhere

I was trying to create an animation and moving some bones around when out of nowhere my formerly 60fps viewport just tanked to 3fps. I'm not doing anything too demanding either, just making a low poly ...
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91 views

My blender is so laggy that its unusable, any suggestions

So, two days ago I shut down my computer for a few hours. When I turned it back on and opened Blender, it was extremely slow and still is. (I've tested Unreal Engine and it runs smoothly). All the ...
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102 views

performance issue creating many objects

I am trying to use blender (2.79b) for batch visualization of data on Windows 10. Unfortunately, blender gets very slow after creating a certain amount of objects. I tried to improve things by "...
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1answer
79 views

Critical Problem : Freeze Problem while Modeling in Blender 2.80 Beta [closed]

I'm trying to model something with Blender. But when I switch it to Edit Mode with Tab and, for example, using Ctrl + R to add a new loop, Blender starts responding about 3-4 seconds after my mouse ...
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1answer
39 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?
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1answer
26 views

I have view port quality issue (Sorry if this has been asked before I couldn't find an answer)

The image shows my problem it has Choppy edges in the viewport. I looked all over google and this forum but could not find a solution. I have an RTX 2080 and i7 8900k. I fixed it once by creating a ...
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1answer
158 views

does more processors and cores help performance?

These are my specs -i3 @3.70 Ghz 2 cores 4 logical processors -8 Gb Ram -147 gb C: Drive -1.81 Tb D: drive when I use rendered view in blender the sampling is really slow (like 1 sample per ...
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Blender Performence Issues

My blender has been lagging very badly lately. I don't know what to do. please help. my laptop performance details Intel Core i5-4200U CPU 2.30 GHz RAM 8.00 GB
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is it possible to limit texture resolution by distance?

I know in the simplify tab you can set a reduced texture size for all of the scene, but is it possible to reduce the texture size in vram based on distance from the camera? For example I have a 2km ...
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1answer
31 views

Does scaling a mesh/curve object to 0 remove its render impact?

I'm currently using the latest build of Blender 2.8 as of this post's timestamp, and I noticed I can't keyframe the viewport visibility parameter (see above) in the Outliner like in 2.79. The render ...
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867 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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42 views

Blender renders always frame 1 on 2nd computer

I'm using a second computer to CPU cycle render an animation on Windows 10. I have the "common" setup to use the same project file (network drive mapped) on both computers with the same output ...
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326 views

Why would Blender slow down in editmode with only 2886 vertices?

Blender slows down in edit mode with only 2886 vertices. I am not sure what is wrong with the file. Can someone suggest a solution to this? My PC specs are: Processor: Intel(R) corei7 3.50ghz Ram ...
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63 views

Blender Won't Open Back Up After Crash

After Blender crashes I wont be able to open it back up again unless I do a restart on my computer. Instead this message will pop up. I am using a Windows 10 Lenovo Laptop, 16 gigs of ram, i7 7700 ...