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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2answers
4k 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
351 views

Is there a way to make Cycles render slower to use less GPU resources

Is there a way to make rendering in Cycles use less GPU resources? Like some console parameters for rendering engine or settings within Blender? I tried render scene with the console (no UI), ...
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1answer
635 views

Leverage multiple CPU cores for video rendering (VSE)

I have a 1950X Threadripper with 16 cores and even if I set the thread count to 16 manually in the performance section, it still only uses 1 core. Have Cycles renderer selected and both user ...
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0answers
652 views

Blender does not seem to utilize CPUs and GPUs effectively for rendering

I've just built myself a new machine because rendering times on my laptop were prohibitive. It's an i7900 10 core processor, 32GB RAM and two Quadro P4 graphics cards with 8GB memory each. The cards ...
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2answers
309 views

Rendering using both GPU and CPU is not possible

For some reason I'm unable to render on CPU+GPU. I've checked on 2 different computers and it's not available. One setup is Threadripper + GTX 1070, and the other one Intel i9 + GTX 1080. Is it a ...
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0answers
756 views

Blender 2.79 Cycles OpenCL RX Vega GPU extremely slow. (Ubuntu 18.04)

I am running Ubuntu 18.04 on a fairly powerful PC (Ryzen 2700x and Vega64) I finally managed to get OpenCL to work at all with ROCm-rehl drivers. When I render the default cube scene CPU rendering ...
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0answers
832 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
56 views

Blender General Best Practices (to affect a game's performance as little as possible)

I've started modeling a few weeks ago by doing some anvils/random objects/humanoids and animations. It seems that for some of them I used too many unnecessary vertices (and perhaps modifiers) after ...
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1answer
99 views

blender running so slow i can take a nap when clicking a menu

I have a big problem. It's been happening for a long time and it's really urgent as this is payed work. For some reason my project is running so slow I can't even click on the menus. I literally ...
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0answers
47 views

Why is my gaming desktop relatively slow at complex animation playback? [duplicate]

I’ve been working on an animation. Due to the large quantity of animated objects (plus a keyframed cloth simulaion), I noticed that when I played through the animation, it went slow. Really slow - ...
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0answers
278 views

Struggling with making an audience/public for an gladiator arena

I am a blender newbie, slowly catching up with the program and geting into 3D modeling. I've managed to create a huge arena model, and I have a lot of audience seats that should eventually be filled ...
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1answer
2k views

Blender selection in viewport suddenly slow

Since a few weeks I suffer from the issue where I have to wait up to 6 sec after selecting an object in the viewport. The time depends on the amount of hidden layers (and hence the amount of objects ...
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3answers
2k views

Poor performance with h.264 VSE

Sorry if this is a noob question but I started using Blender today as a free video editor and now that I'm rendering my project, it's taking a lot longer than I was expecting. The project is ...
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2answers
3k 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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0answers
309 views

Viewport performance due to high poly count

Is there a way of reducing poly count only in the viewport? My gtx 1070 is struggling while sculpting terrain (It has 2000x2000 subdivisions)
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0answers
158 views

Blender 2.76b - Slow performance on Viewport Shading Material

I'm running Blender on Ubuntu 18.04 LTS; I use Blender 2.76b. My problem is when I turn the Viewport Shading to Material Mode, it is very very slow. It is even much slower (much!) than the Rendered ...
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4answers
4k views

How to disable entire tracks (or multiple clips) in VSE

I'm using Blender to do the video editing for one of my projects. The interface is somewhat counter-intuitive, but I use it because it gives me crazy amounts of control and it's very dependable. I'm ...
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0answers
56 views

Performance issues - make tree leaves like this?

Ok, I am trying to achieve animated, particle like leaves (low poly not realistic) like this - https://youtu.be/cKS3VM1a3TU?t=4m8s Obviously my idea was to make a group with some leaves and make a ...
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0answers
22 views

Scene ran fine, then updated windows, now playback is VERY slow

So, I was animating a scene, not too complex, and playback was fine, then I found out my windows was outdated so I clicked update and restart, it then took 5 attempts to get back into the computer as ...
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1answer
3k views

Optimize Blender's user interface for performance

As a simply a Blender hobbyist, I can't justify the an upgrade to improve the performance of my computer. I wondered, "What could I do that I'm not already doing that could make Blender run faster?" ...
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0answers
230 views

Blender not responding when I play animation

This is my animation, just about 285 frames, 78 keyframes When I play animation, Blender is not responding And here is Blender status in Task Manager. I think it isn't so strong What's the problem? ...
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1answer
528 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, ...
5
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1answer
21k views

Why is my render taking so long?

My interior is rendering almost two hours and it shows only 2 samples that have been rendered. I don't quite know how to select properly those render settings to make good quality interior scene. ...
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0answers
89 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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0answers
149 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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0answers
869 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
3k 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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0answers
237 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
200 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, ...
2
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1answer
2k 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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1answer
75 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 ...
10
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6answers
38k views

Best Tile Size for Blender Internal Renderer and Cycles

There've been a few discussions about tile sizes for Cycles, but none that I can find about that of BI. Since it renders with the CPU, does it follow the same rule as cycles where smaller is better (...
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3answers
750 views

Blender for Beginners [closed]

My nephew seems interested in doing 3d and all the great things Blender can do. I've done enough in Blender to love it. But I can't afford a $4000 computer specified, especially not knowing if his ...
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1answer
108 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 ...
-1
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1answer
220 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 ...
-2
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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
261 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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0answers
22 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 ...
2
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2answers
25k views

What is fastest, rendering on a CPU or a GPU?

For Christmas my parents gave me a new graphic card. Even though I got a new card (R9 390), the rendering times are really slow. I am asking if I should get another card instead or perhaps its better ...
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1answer
176 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 ...
3
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1answer
2k views

My CPU is still faster than my GPU

When I render something with blender my CPU is faster than my GPU. Why is that? My GPU is Nvidia Geforce GT730 2gb and my CPU is intel i5
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1answer
2k 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 ...
24
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4answers
14k views

Cycles hybrid rendering

The Cycles render engine can render both on the CPU and the GPU. I often render over-night so I do not need my computer to be responsive. Is it possible to render with Cycles using both the CPU and ...
0
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1answer
219 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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0answers
446 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 ...
8
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1answer
12k views

Is it possible to use different CUDA-capable graphic cards to render simultaneously?

I know that you can't mix different spec cards for SLI gaming, but I suspect that when it comes to 3D rendering, the renderer will simply divide the work up automatically. Choosing the optimum tile ...
9
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1answer
12k 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
909 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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0answers
106 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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