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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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) ...
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19 views

Blender on Surface Pro X [closed]

Blender will not work on the Surface Pro X. It runs, but it doesn't recognize the GPU in the machine and shuts itself down. All my drivers and firmware are up to date. The GPU should be more than ...
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42 views

Should I enable both my CPU and GPU in the CUDA preferences? [closed]

I am using blender 2.8 on windows 10. I have a question about System CUDA options. There are two checkboxes one for my graphics card GeForce GTX 2060 and another option for Intel Core i7-4790 CPU @ 3....
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large poly count performance

I tried loading a model with a large number of polygons - it really made blender 2.81 crawl. 6.4 million-triangle 3D scan of the Bust of Nefertiti. aem_aem21300_3dsl01_mo08-03_p.obj from https://www....
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1answer
38 views

Cycles Smoke render - Extremely poor performance & crashes

I have a decent new build: 3700x + 2x 5700XT, 32gb ram, using 2.81. I thought smoke rendering for a fairly simple scene would be a breeze (excuse the semi-pun) but for a render of a scene containing ...
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34 views

I have better than optimal hardware but Blender keeps crashing

I am trying to get started using blender and follow a simple tutorial to get used to creating abstract renders for design work. While running blender even performing the simplest of tasks my computer ...
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17 views

How to make performance test while render my scenes

I want to do a performance test via scenes that I created. Could you give me some tips or applications which will check performance in the blender? GPU, CPU, Memory usage? Or maybe it's possible to ...
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7 views

Why does my project run so much faster in Texture Paint mode than in Layout mode (and sprites render without alpha)

I have a fairly complex scene that is running pretty slowly (not just to render, but the whole GUI is running sluggishly). I think it is because I have a smoke simulation in the scene but I am not ...
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70 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 ...
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9 views

Performance hiccups on the first frames

I started noticing something really annoying in my PC. I'm running Blender 2.80 with a GTX1080Ti, Ryzen 7 1700 and 16GB DDR4 RAM. Everytime I move my camera or zoom in or move an object there is a ...
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Rigify rigs in Blender scene are making some very bad lag. How to fix performance issues?

I have a scene where there are 2 human models rigged with rigify. I cannot animate these anymore because when they're in the viewport, I get about 6 FPS on the animation preview. I know for a fact ...
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63 views

Does Blender bloat unnecessarily the Windows Registry?

According to Revo Uninstaller, Blender adds more than 4400 registry keys to the Windows Registry. They are almost all spread in Registry folder: ...
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41 views

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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48 views

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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23 views

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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15 views

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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13 views

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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36 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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10 views

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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18 views

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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45 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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64 views

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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1answer
41 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 ...
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1answer
43 views

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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86 views

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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311 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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22 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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39 views

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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27 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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1answer
85 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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2answers
103 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
67 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
217 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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1answer
295 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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43 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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96 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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1answer
86 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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39 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
79 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
579 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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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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46 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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29 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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2answers
103 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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150 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 "...