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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128 views

Limits of uv unwrapping in blender 2.80

I've been researching how Blender uses the CPU. It seems each algorithm is different where some may use all cpu cores, others may only use 1 or 2 cores. I am trying to unwrap a very high poly count ...
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1answer
92 views

How to allow blender to only use part of your CPU computing power?

Is there a way to only allow blender to use part of my computing power? For example, I don't want blender to use more than 25% of my CPU computing power. Please make sure that it doesn't shut off ...
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43 views

How to improve render time and render farm recommendation?

I'm planning to render 5 - 10 sec animation of different interior spaces within the project. I wonder for this type of scene (denoised), what can I do on my render setting to reduce the render time ...
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1answer
84 views

Does decimate an object helps cycles rendering faster in blender?

Does decimate an object helps cycles rendering faster in blender? If we decimate the object and use smooth shading, will it render faster specially in those scenes where lightning matters the most?
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Does physical size of an object impact performance?

Pretty much what the headline says. However to be clear, does a 1m cube cost less in performance compared to say a 10m cube? I assume it does but I couldn't find a definite answer to this anywhere. I ...
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52 views

Blender runs very slow on my laptop and freezes a lot

Blender runs very slow on my laptop and freezes a lot. I did everything to fix it but it didnt work, so I'm thinking the problem might be my computer. Here's the properties of my laptop: Operating ...
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9 views

Why my blender cant open after updating gpu driver

After i update my gpu driver my blender cant open, Spec : windows 10 64 bit, Intel core i5 7th gen, Intel hd graphic, Radeon tm 520, Ram 4 gb Free space 500gb
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25 views

Why these two same projects, renders at different speeds?

I was having problems with rendering for a long time, which caused hours of rendering a single frame when the scenes weren't soo complicated. I was messing around with the settings yesterday until I ...
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115 views

Cycles Renderer - Updating Shaders and Images Every Frame?

This question is more of a curiosity to the potential of increasing render times, however, after finding very little out about this anywhere else, I am thinking it may be an intentional feature. I am ...
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1answer
196 views

Does Blender support threading for data processing?

One of the most time taking part while working with images in Blender is to get pixels to numpy arrays and then to assign them back. As Blender supports multi-thread render I've thought it could be ...
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1answer
91 views

Does mesh size affect performance/should I make my object life-size scale?

All of the things I've googled regarding this issue deal with what to do when your mesh is at real life scale but is really small. I want to make a giant creature and put it in an environment that ...
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1answer
683 views

Blender 2.82a very slow compared with 2.79

I am coming back to use Blender after a bit of a break of a couple of years. I did a lot of work using version 2.7x. I am now trying to use version 2.82a. My PC is running Linux Mint 19.3 I have ...
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Confused by the difference in render time between two projects

I'm still a beginner with Blender (been doing stuff occasionally for a year now), so I've got no knowledge about the intricate technicalities of rendering but this is the first time I'm really ...
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25 views

Troubleshoot performance?

Are there any tools or options to help troubleshoot performance? When using blender, every few seconds I get a split-second of lag. This interrupts any smooth movements, like transforms, or scrubbing ...
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22 views

swap “disable in viewports” and “disable in renders”

I'm working on a big project and to improve performance I have hidden a lot of modifiers and objects in viewports. But now I want to see how the current full version of the project looks like in ...
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39 views

Why doesn't Blender use all my hardware … CPU GPU?

I'm rendering a 1080p video clip, it's so slow. The question is; why does blender only use 20% of my CPU and 35% of my GPU? Do you have any suggestions or videos on improving this? It takes 45 minutes ...
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366 views

Blender and Twinmotion

I am a landscape architect and I have been learning Blender for a few months now and I just started with Twinmotion. Something I don't understand is that navigation fluidity in the viewport with the ...
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43 views

How much would Blender benefit from multiple core / threads?

I'm currently building a PC for game development (and regular gaming of course :P) and I have all of my parts chosen (Radeon RX 580, 16gb Corsair vengeance, 256gb m.2, 1 TB HDD, MSI B450 Gaming Plus) ...
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87 views

What graphics card is faster than i7

I have a 5th generation MSI BOARD, H77MA-G43 with 16 Gig ram and CPU: i7 3770|3.4GHz. I render within cycles, the render time of the i7 CPU is 5 times faster than the GeForce Gtx 1050 ti What graphics ...
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3answers
11k views

Cycles is painfully slow even for the simplest of scenes

Google shows that Blender's slow rendering has been questioned numerous number of times before too, but in my case it has gone to a degree that rendering even the simplest things requires ages. I'm ...
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1answer
472 views

Terrible VSE output performance when rending

I use Blender as VSE. I was going to edit some clips. my setting is in screenshot. Blender version: 2.81a, download from Steam. OS: Win7-64bit My Hardware: i7-4790k with 16G memory Nvidia Geforce ...
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25 views

Does the adaptive subdivide work for boolean reference objects?

Suppose I have a sphere which I wish to cut out from a cube. Will using the adaptive option in a subdivide modifier result in the hole in the cube being adaptively subdivided as well?
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Optimize cycles background rendering

Is there any trick to increase performance in background-only tiles in cycles. As you can see in the pictures, an empty render takes more than one minute. When you render motion graphics animations, ...
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1answer
1k 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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1answer
91 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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40 views

Extreme lag in the viewport directly after Startup

I've just installed Blender on my new Surface Pro 7 (Quad-core 10th Gen Intel® Core™ i5-1035G4 Processor, Intel® Iris™ Plus Graphics, 8GB LPDDR4x RAM) and really can't get it to work properly. (...
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219 views

How is my CPU rendering faster than my GPU?

So ive looked through some other threads and wansnt able to find a fix for my problem. Thats why I decided to ask by myself. The Problem: How is my CPU, a Ryzen 5 2600 overclocked to 4.2Ghz, ...
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401 views

Where are the settings to increase cycles threads?

I am trying to adapt the cycles render code to allow me to use the full threading power of my GPU (Radeon RX750 8Gb, 2048 OpenGL threads). There seems to be a limit from some time ago of 1024 threads, ...
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2answers
1k views

Render using all cores except one (or N)

Is there a way to configure the Blender Render or Cycles to use all the available cores in the machine except for one (or N) of them? I'd like to set a render off in the background but leave me with a ...
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1answer
169 views

Blender 2.82, two GPU but only one render in Cycle

I'm not sure is this should be like that but, I have two GTX 970 graphic cards...and when I try to render something in cycles, I've notice that only one GPU works about 30-40 % and second one stays on ...
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1answer
147 views

Integrated Graphics Requirments for Newer Laptops?

I'm buying a 10th Gen Intel Core, HP laptop. The specs say it only has an Intel Graphics Coprocessor. Will it run blender 2.8? https://www.amazon.com/2020-HP-Touchscreen-Premium-Laptop/dp/B081SM57RY/...
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97 views

Multiple Grease Pencil objects makes Blender lag and eventually crash

I'm trying to make my first 2D animation with grease pencil. I drew a walk animation of my character frame by frame, about 257 frames, then I duplicate it as object, change location and direction and ...
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2answers
502 views

How can I get the number of vertices/triangles per object?

I'm working on a scene that's getting complex: I have 30 objects for a total of about 5 million triangles. I start to be concerned about performance. I would like to know which of the objects ...
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1answer
190 views

Blender 2.81 render not using all GPUs

I have 2 Nvidia GTX Titan Black graphics cards in my machine, but Blender keeps using only one of them. I have them both checked in the Preferences > System > CUDA tab but when I render and take a ...
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22 views

Improving performance in a blend file with hundreds of different materials?

We use a blend file as a material library at work to append from when we render. The library is starting to crash on some of our computers which has less power and ram (blend file is 800mo with packed ...
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51 views

2080 TI staying below 35°C rendering in Cycles. Why?

So I just finished a 24 hour render of a smoke simulation in cycles using Optix with my 2080 TI and I’ve been noticing that my GPU never passes 35°C. I feel like that’s very cool and that I’m not ...
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1answer
66 views

Is it worth running Linux on my Mac to use the built in AMD graphics card?

Is it worth running Linux on my Mac to use the built in AMD graphics card with Blender? Right now I'm only using cpu and it takes a very long time for high poly rendering. Would it work to partition ...
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1answer
218 views

Low FPS Blender(viewport)

Started using blender, FPS was great, but the UI was flickering. Googled, I didn't have an opengl32.dll in the directory, then added it. UI Flickering gone, but FPS dropped drastically. Would like ...
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58 views

Hacks for improving performance on large scenes

Hi I’m using blender mostly doing exterior architecture visualisations. Through previous months I’ve found many problems that affects this software. But the main issue is lack of performance power ...
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1answer
323 views

OSX Eevee performance with multiple materials in OSX

EDIT 2: Thanks to a user posting a detailed technical explanation as to why the bug is manifesting (TL:DR, certain material properties cause multiple calls to the shader compiler in the AMD driver ...
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0answers
42 views

Screw Modifier Best Practices

I am creating a three-strand rope in blender using the screw modifier and was wondering what might be best practices for making a long rope. Essentially it is a choice between iterations or degrees. I ...
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103 views

Blender 2.81a is slow on Macbook pro when selecting items from the Properties window

I recently got a new MacBook Pro so I have more free space on my computer's memory than ever before and yet my properties window still makes blender run slowly. My Macbook pro is a new model so it's ...
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5answers
5k views

Is it possible to render a movie on a single computer in blender?

Is it possible to render a fairly graphical movie on a decent gaming-computer, with a GTX graphics-card, 4 2 GHz core CPU and 8 GB of RAM, or do you need to have a gigantic rendering-farm like Disney? ...
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0answers
114 views

Script runs very slow when changing parameters in Add Object menu

I've made my first addon based on an internal blender Text editor template. It is used to add primitive meshes and then control some of their aspects, much like adding primitives like Cubes or UV ...
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0answers
108 views

Blender Benchmark crashes

I tried to run Blender benchmark because I felt it was a bit slow today working and the GPU was being used intensively in the task manager while sculpting, and I didn't used my new laptop for 3d too ...
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0answers
141 views

Viewport performance, i9-9900k vs Ryzen 3970x?

(Apologies in advance in case this is the wrong place to ask this!) I'm building a new workstation and trying to decide which CPU to go with. Does the viewport performance in Blender benefit from ...
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0answers
344 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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3answers
3k views

Managing/Reducing noise in a night scene

I've been trying to get a pretty noise free image from this scene for a while. And nothing seems to be working. I've been trying to use 3000 samples, then rendering different noise seeds and composite ...
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1answer
3k 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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1answer
228 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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