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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)

0
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1answer
216 views

Help me understand why my cycles render is so slow

This is NOT about asking how to speed up cycles renders. I am just confused to why a scene has taken so long to render. Here we go: I have a camera (WOW) looking up into treetops. Pretty simple. ...
1
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0answers
25 views

Blender file size increses drastically after joning duplicated object and performs very slow

When i join (CtrlJ) duplicated (ShiftD) multiple object or mesh then blender performs very slow and file size increases too from 100mb to 1gb. Does anyone have solutions for this issue?
0
votes
1answer
30 views

Blender does not start

Installed Blender on a machine with Core i7 CPU, 16GBs of RAM and an NVIDIA GeForce 650. I managed to run Blender twice. On the third time nothing was shown and Blender didn't load properly, even ...
2
votes
1answer
213 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), ...
0
votes
1answer
42 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 ...
1
vote
2answers
62 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 ...
0
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0answers
27 views

Is it possible to use GPU to edit very high polygon meshes in Blender?

So I have a mesh I'm working on and it's little over 4,000,000 polygons, and the performance is bad already. I have like 2 frames in edit mode. I'd like to get the model to at least 66,000,000 ...
1
vote
1answer
44 views

Linux Ubuntu 18.04 - Sculpting performance (dyntopo) is terrible in comparison to Windows

OS: Ubuntu 18.04 CPU: i5-6600K GPU: GTX 970 RAM: 32 GB Sculpting on objects with more 100k polygons (dyntopo constant detail 50 px) lags blender, especially using Snake Hook brush and dragging ...
1
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0answers
77 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 ...
0
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0answers
17 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 ...
1
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0answers
55 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 ...
0
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1answer
65 views

LOD in particle systems

I've already checked this two questions but neither solve this problem: Level of Detail of Particles System? How to access data related to individual particles? Both posts derive to use animation ...
0
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1answer
41 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 ...
1
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0answers
15 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 - ...
1
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0answers
59 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 ...
0
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0answers
32 views

Animation preview is in only 4 fps

So when i start my animation, it is always capped at 3/4 fps, making it impossible to work with. I tried simplify option(in scene tab), but that doesnt seem to do anything
0
votes
1answer
55 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 ...
0
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0answers
42 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)
1
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0answers
58 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 ...
1
vote
0answers
24 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 ...
0
votes
2answers
660 views

Poor performance on mac with AMD Radeon Pro 560

My mac is a macbook pro 2017, with AMD Radeon Pro 560. Seeing this question How to do GPU rendering on MacBook Pro 2016 (AMD Radeon Pro 460) I also get the Cycles render to work, but it renders at ...
0
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0answers
17 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 ...
1
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3answers
367 views

Blender is only using one tile and only on CPU

I have tried to make blender faster by using my Nvidia GeForce GPU in the user preferences window and under the render options in the properties window. But I can see in the task manager that the CPU ...
0
votes
1answer
203 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
50 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? ...
0
votes
1answer
85 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, ...
0
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0answers
36 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 ...
0
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0answers
22 views

Render freeze on random tile

I have Radeon Rx 580 and when i am trying to render my scene with gpu it just freezes on random tile, even have to shut Blender in processes. It's not even complicated scene to render Cpu cracked it ...
1
vote
0answers
47 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 ...
0
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0answers
357 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 ...
0
votes
0answers
129 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 ...
-1
votes
1answer
280 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
143 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 ...
0
votes
1answer
152 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, ...
1
vote
1answer
324 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 ...
0
votes
2answers
624 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 ...
-4
votes
1answer
45 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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0answers
41 views

Blender Game Perfomance Rasterizer high with lags in first start stand alone game

Every time i start game in stand alone full screen mode Rasterizer go to 70 to 95% making legs for few seconds and if i walk around map still legs persist.if player dead go to game over scene.If ...
-1
votes
1answer
56 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 ...
1
vote
1answer
57 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 ...
-2
votes
1answer
594 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 ...
1
vote
0answers
44 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 ...
1
vote
0answers
16 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
votes
1answer
60 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 ...
0
votes
1answer
86 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 ...
0
votes
0answers
258 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 ...
2
votes
2answers
1k 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 ...
7
votes
1answer
4k 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!
1
vote
2answers
858 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 ...
0
votes
0answers
290 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 ...