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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346 views

Will there be a browser version of Blender? [closed]

I heard about WebAssembly, which lets C/C++ programmers target the web, I was just wondering whether Blender has any plans to make a "web" version, that runs in the browser? At the recent Google I/O, ...
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78 views

Create floor for a top down 3d game

Dear blender community, I am a beginner in 3D animation and I am planning to make a 3D top down perspective game. I want to create the game 3D assets in blender and export it to use in an external ...
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99 views

Imported .obj has too many faces

I imported a .obj file created with osm2world, and even though the imported objects are all low poly, they have many faces. E.g. this is just a simple plane: but has this many faces: Now my ...
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695 views

blender running slow and lagging

I installed blender and tried to run it but it was running very slow. I tried with integrated graphics but still no use. I tried to roll back my drivers but that option was unable. I tried to change ...
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0answers
566 views

Video editing performance

I'm trying to edit a video using Blender and the video playback is really slow for some reason. The input video is 3 AVI clips all resampled to 25fps. They were all different framerates, so I used ...
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1answer
2k views

Crazy low fps when playback animation

When I playback an animation I get around 1 FPS with really basic object. My scene contains 1 Torus with standard vertex and array modifier set to 8. No Subdivision modifier and no texture or light, ...
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1answer
268 views

Does Blender work on IntelHD 4000

I just wanted to know if I need a high graphics card by that I mean like GTX 1000 etc. Because if I want to make a high graphics animation then I would need a high graphics card right?
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222 views

Speeding up the viewport

I just had a shock when I opened 2.28c (it's been far too long) The drawing was super fast on my EEEPC. All the time I thought my graphics card was slow (and it is by comparison) when actually ...
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1answer
190 views

Slower Rendering in newest daily build 2.79.4 vs. 2.79

I've installed version 2.79.4 and it is a bit slower than 2.79. I render with GPU 980TI, and the same scene with the same settings (opened and rendered without any changes). Older - 1000 samples, ...
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1answer
1k views

How to increase performance for GPU rendered interface parts?

I just got myself a new graphics card that is able to handle workflow. I still got really bad playback performance of the 3D view combined with animation by armature. I usually get displayed 0.83 FPS ...
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2answers
2k views

Multi-core/threaded particle simulations

Recently did a liquid splash via Gleb Alexandrovs tutorial. So smoke + flow field + particles + meta-balls to get some sort of fluid splash going on. Where I noticed, none of these processes are able ...
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1answer
62 views

Blender Laggy windows 8.1 Desktop

Title says it all, why the heck do I need to explain this any further with 30 characters??? Hi, I had this program installed on THIS Exact same system and OS Before. Had to re-install the OS and ...
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1answer
143 views

Blender Freezing Around 3 Minutes of Being Open

So, here's my issue. When I open Blender (either through a desktop shortcut or through file explorer) it opens up normally. However, when I give any sort of input, such as selecting the cube or ...
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1answer
83 views

Is there a way to boost my performance manually?

When my files get around 190 MB big the performance gets slow. Especially when using dynotopology. It starts lagging and sculpting won´t work in real time. Isn´t 8GB RAM enough? Is my Mac already to ...
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1answer
1k views

Eevee performance benchamark

Are there any figures for the system requirements of the new Eevee renderer, measured in something like stream processors/face given a certain material? The current viewport has worked for me on low ...
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0answers
167 views

Blender command Z is slow?

Alright I'm on mac latest OS, latest blender 2.79 and really just with command Z (this is just since updating) - it takes a WHILE like good 30s to undo something. Modeling, everything else pretty ...
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21 views

Multiple of same Render layer performance in the compositor

As far as performance goes, is there any penalty for duplicating the same render layer node multiple times, as opposed to using more noodles from the same node? For organizational purposes, i want to ...
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1answer
125 views

Performance difference between AE and Blender compositor [closed]

I tested the curve effects in Blender and AE using a 5k x 3k image. Like this, Blender has a slightly slower performance. I'm curious about the principle of the program that causes the difference in ...
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1answer
173 views

Will using quads affect game performance?

So I will start out by stating I am new to blender and have a background in software development. I know why Blender uses quads and the importance in using them. I am more curious as to things to ...
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408 views

Blender very slow after upgrading to windows 10

So I recently did an upgrade on my old laptop. Its a very weak laptop with a ATI Mobility Radeon 3400 but blender always ran pretty well on it. Now after upgrading to windows 10 blender first said ...
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2answers
2k views

Blender viewport lag

I'm not sure if it's even related, but in the top right corner of the viewport you can see it shows 5FPS. I just downloaded Blender today and been trying to fix this problem for hours. My Blender is ...
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1answer
9k views

What is Clamp Direct/Indirect?

What does the "Clamp Direct" and Indirect values mean? I may seem silly but i'm really new to blender. Could you please tell me what are they useful for? Thanks!
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2answers
2k views

What does the Render and Preview of the Samples section do?

Yesterday, i put my animation to render, it went fine. But one thing that bothers me is: What is the Render and Preview? I actually discovered that the Render is something like the quality, so i keep ...
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0answers
681 views

Blender 2.79 freezes when I try to open file

Every time I try to do anything that involves action of actually looking at my computer files through blender, Blender stopps responding (right after I click the button) for 2-5 minutes before ...
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1answer
1k views

Best CPU for modelling high poly scenes in Blender (10 million polygons and more)

Everybody working in blender knows, that on high poly scenes blender starts responding very bad and slow. If a scene contains 10 million polygons and more working in blender becomes nightmare. It's ...
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0answers
89 views

Performance relating to Object Instances

Just a simple performance question. When using object instances, the same vertex data is used for another object (like an exact duplicate) causing much less memory usage when building up the ...
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0answers
240 views

time to decimate & bake a hi poly to low poly model?

How long does it take to decimate and bake the texture from a hi poly human model (~500K) to low poly model(~20K). What blender addon do you use for that ? With or without GPU ? Thank you Albert
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2answers
72 views

Dramatic changes in performance depending on selection

I am working with a very large scene with a lot of poorly optimized objects (from sketchup.) I am trying to optimize my settings so that I can properly navigate the file to make necessary material ...
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2answers
3k views

Blender Global undo is very slow on complex scenes

When I'm working with complex scenes (a few million polygons with +- some subdivision), say you're making a weapon highpoly model, the Blender's Global Undo becomes extremely slow. Even with simple ...
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2answers
546 views

A character made of cubes? Is it bad for gaming?

I've seen these models on sketchfab that I find good enough for a mobile game, but if you look at them in wireframe mode it looks like they are made of a succession of cubes (or very close shapes). I'...
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0answers
253 views

Keyframes without interpolation / Behaviour [duplicate]

a quick question on how keyframes / rendering an animation works within Blender. I want to render multiple images with different settings within some materials ,different shapekeys and poses, but no ...
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0answers
446 views

Keep images in memory between Cycles renders

I have an application which requires me to render hundreds of thousands of tiny images in Cycles. The scene uses a HDR Light Probe, which is ~100mb uncompressed in VRAM. I've noticed that the ...
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2answers
944 views

How can I make Blender put less strain on my CPU?

I am using GPU rendering and my CPU is really bottlenecking blender down to only 50% of max GPU performance, while blender is taking up more than 90% of my CPU usage. How can I put less strain on my ...
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92 views

Does decimate help viewport performance?

I'm seeking to increase viewport performance to help when posing/animating. Does it work to just toss a decimate on my objects? Will this actually help performance, or just add the extra calculation ...
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0answers
269 views

Separate windows are solid black when opening blender

I have a frequent problem where I separate out multiple blender windows onto my secondary screen. These are usually node editors and UV/Image viewer windows. When I re-open blender, often these ...
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1answer
601 views

Using two GPU video cards

Does anyone know, how can I check if I am using my two video cards? It seem Blender is using only one of them. I have checked both on the user preferences settings. But reading temperatures in GPU-Z ...
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1answer
2k views

Screen lag during GPU rendering

GPU rendering causes some screen lag while rendering, with the amount depending on how heavy the render is. I understand this is due to the display driver being busy. What I don't get is why it ...
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1answer
41 views

Disabled constraints still being calculated?

I ran into an issue where an Eye rig setup to track a camera using bone constraints was causing performance issues. Each eye had a bone with an IK constraint targeting a gaze control bone, which had a ...
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3answers
685 views

How can I make my file light weight?

I'm making a fort and I have made a quarter of it to mirror later. I started building with the default cube. And until I make complete model its 210 MB heavy file lagging much. I have to mirror and ...
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1answer
49 views

Viewport performance changes when in camera?

I am working on a fairly simple scene (80k verts) that is mostly made up of simple objects with some subsurf. Normally, my viewport performance is just fine. However, when I hit numpad 0 to view the ...
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46 views

Are my computer specs too weak to perform a sub division on a plane with 100 subdivisions?

I am trying to learn texturing with cycles and I am running into a problem trying to apply a displacement map. The tutorial I am following takes a plane subdivides it 100 times and then applies a sub ...
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0answers
229 views

Blender snap (linux, specifically Ubuntu 17.04) very slow / freezing when in material view

I recently downloaded the Blender snap from Ubuntu Software because it seems to be always up to date, Then I opened one of my projects to continue working on, then it just freezed for a sec then ...
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55 views

How to list all data in a blend, and how much disk space it's using? [duplicate]

I have a blend file that I've worked with for a long time, testing and experimenting with things like rigify and almost everything else. I'm trying to clean it up. By removing a lot of mocap actions, ...
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1answer
6k views

How much space does Blender take up on a computer?

I've been considering downloading Blender, but am unsure how much space it'll take up on my computer's memory. Thanks to anyone who can help answer this question!
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6answers
853 views

How to find the number of loose parts with Blender's Python API?

I want to find out how many loose parts a mesh has using Python, i.e. write a function that takes a mesh object as an argument and returns an int. So far I haven't found a way to access this ...
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1answer
4k views

Can't find VBOs in the system settings

I want to enable VBOs (Vertex Buffer Objects) but I can't find it anywhere in the User Preferences. I wanted better performance when sculpting because it freezes with more than 500k polygon meshes ...
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0answers
307 views

Is there any way to optimize the performance of blender on my computer?

Quite some time back I had blender on this very computer and it worked great. Recently, my hard drive crashed and I decided to switch to SSD. I reinstalled blender on my computer and ran it. Now ...
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1answer
434 views

I am having very slow performance running Blender [duplicate]

I just installed Blender and I am having very slow performance,when I press any menu buttons it takes around 3 sec. to respond or show is this normal? Do I need to set up something additional or ...
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3answers
410 views

How to tweak render when each render takes so long?

Like any artistic project, until you can see that final render, it's impossible to know how close you are to achieving your goal. As we will all know, from being 'almost finished' to being finished ...
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1answer
540 views

Blender running at a crawl after NVidia update

I can’t say exactly the NVidia update was the cause but several other people and I have experienced a problem with Blender slowing to a crawl in the last few days. If you are having this same problem ...