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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7
votes
1answer
911 views

Render FPS is low

I looked at the other questions about this, but I'm finding no solution. Partly because I have the newest blender version, 2.76. I am playing my animation back, and it plays around 5 fps. I am using ...
2
votes
1answer
815 views

Does Cycles support all (relatively new) CUDA GPUs?

Are there any limits on the CUDA GPUs that Blender will support (besides really old ones)? I thought I heard somewhere that Blender doesn't support workstation class (NVIDIA Quadro) GPUs. But I have ...
3
votes
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
6
votes
2answers
1k views

Faster blur effect in Blender VSE

Blender's Video Sequence Editor allows you to use the Gaussian Blur effects strip to blur the image or video, however, it uses a lot of CPU and the rendering is slow like a hell. It takes around 2 ...
1
vote
1answer
345 views

Speed-up animation render which uses a movie texture

I have many rectangles which display a movie clip, each starting at different points (offset) in the movie. During animation render, the info area shows: Loading texture-movie.mp4@1234 ...
15
votes
1answer
9k views

Why is my cycles render still grainy on 1000 cycles?

I recently made a desk lamp model and set the samples to 1000 for an overnight render upon waking up the image was still rather grainy is this something in my blender that isnt set right or something ...
2
votes
0answers
1k views

make blender faster while working. not concerned about render speeds

So, to start off. I'm a member of cgcookie.com. they offered some pretty good tips, like turning of VBO and stuff. Still, I just feel like for having an home built i5 and an GTX970 card and 16GB of ...
0
votes
2answers
2k views

What is the right polygon count? [closed]

Firstly, I was surprised I did not find a thread like that here(I hope I did not miss it.) So what is the right number of polygon count or better triangle count, since this is what BGE renders from ...
1
vote
1answer
733 views

anmiation freezes while playing

I made a short intro and it is fine, but when I press (play) the animation freezes very often. I also tried to render the animation hoping that it would run smoothly but the problem didn't get better.
2
votes
0answers
237 views

Creating/Handling pathfinding large world waypoints in Blender

I am trying to create an importer/exporter script for an open world's game map. However, I am being constantly hit and set back by performance of blender. I want to be able to create way points for ...
2
votes
1answer
2k views

Optimal number vertices in a game

I am creating a game and was wondering what a good number for the total number of vertices or triangles; either answer would be great. What quantity can the Blender game engine handle rendering in ...
2
votes
2answers
1k views

Is there a way to “hack” blender to work better in windows?

I have been using blender for some time in a Macbook pro. Then I used it in linux. Now I'm running it in a Windows 10 machine with similar or better capacities and it doesn't render nor shows previews ...
1
vote
0answers
208 views

Blender runs really slowly on my Cintiq 22HD

I have a computer with a three monitor setup. One of the monitors is a Cintiq 22HD that allows me to draw on the screen. I also have an old Intuos 3 hooked up that lets me draw with a pen in the ...
4
votes
1answer
2k views

VSE: How to Speed up the Preview of Image Strips?

The Issue Is there any way to speed up the preview of image strips in the video sequence editor? Unfortunately, the preview in the VSE is very choppy and indicates that it runs at only a few frames ...
2
votes
1answer
1k views

Blender game runs very slow

I am making my first game in Blender, so being kind of newbie, but I notice that when I run it in the standalone player, it runs very slow and jerky (in the built-in also, but not as bad), like some ...
6
votes
1answer
3k views

Blender Cycles Slow Rendering Interior Scene

I have create a very basic blender scene with Suzanne and a modified cube with no UVs and only basic materials. The scene contains about 3 emissive lights. Using the cycles rendering engine, when ...
15
votes
1answer
12k views

What does static/dynamic BVH do?

In the render properties panel, under the performance rollout there is a setting for static vs. dynamic BVH. I am simply wondering what this setting does. From the Wiki: The raytracing ...
2
votes
1answer
579 views

luxrender gpu render farm

Is it possible to set up a gpu rendering farm? I have a cpu render farm but I would like to make a faster gpu render farm. The gpus I have are a geforce 8400m and a geforce gt 730 my is is ubuntu 14....
4
votes
1answer
541 views

Is there a render engine with complete GPU support and Blender integration

Is there any rendering engine for Blender that only uses the GPU? I know that Cycles and Luxrender can do this but not all materials work In gpu mode. So what I am asking is are there any rendering ...
5
votes
1answer
17k 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. ...
7
votes
1answer
9k 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 ...
1
vote
1answer
667 views

2.74 not using all CPU cores when baking rigid body physics

I noticed during baking physics (with 2,500 rigid bodies in a solidified cylinder) that, instead of using all 8 cores on my AMD FX-8150 CPU, it maxes one out at 100%, but then passes the baton onto ...
8
votes
2answers
2k views

What are the advantages of turning on “cache BVH”?

What are the advantages of turning on cache BVH for a cycles render? Not sure how to elaborate. I'm not necessarily looking for a technical description, just a better idea for when to use it, and ...
4
votes
2answers
747 views

Video Editing - System Resources not being used

I need help getting blender to use up more of my system resources to render videos as it never seem to see it use more than 30% of my CPU and my GPU stays on idle (changed settings to use cuda). It ...
8
votes
1answer
1k views

Working with high polycounts?

I'm importing meshes to do some retopologisation on but blender just can't handle it without me having some sort of quadro card. Do I have to use mudbox or something similar to do work with such poly ...
8
votes
3answers
2k 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 ...
2
votes
1answer
457 views

Blender viewport and UI lag when external monitor connected [closed]

I have a macbook pro running windows 7 and I use a 1080p monitor when at home with laptop screen disabled. When I have my second monitor plugged in (via mini display port -> VGA apple adaptor) there ...
6
votes
1answer
799 views

Turn physics proccesses off and on?

Is there an easy way to, while keeping all of the physics settings the same, turn off the physics processing? Essentially, I have a huge scene with a ton of physics and I'm not ready to bake it yet ...
1
vote
1answer
266 views

Difference between stacking and extruding meshes? [duplicate]

What would be the difference of stacking objects into each other and extruding by starting with one single primitive. How does it influence performance and what are the advantages and disadvantages ...
3
votes
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 ...
3
votes
0answers
1k views

Why does it take so much longer to track uncached frames?

I'm attempting to track a slightly longish shot, and I don't want to fill up all my ram. I can play the animation with ⎇ AltA and blender caches and displays uncached frames in near real-time (~...
1
vote
0answers
478 views

Run blender on GPU is as low as CPU [closed]

I am running blender on GPU. I remark that there is no high difference between CPU and GPU as not expected. What is the problem? CPU information: ...
2
votes
2answers
3k views

What is better for rendering in cycles? A network? Or a single monster workstation?

Is it better to have multiple render nodes and do rendering over the network? If so - is there a special software to set this up and is it hard to configure this? Is there a max amount of render ...
10
votes
3answers
5k views

Is Physics calculation multithreading possible?

Is there a way to turn on multithreading to make use of all of my computers cores for simulations? I am running on a monster of a machine, but without utilizing all of the cores, physics simulations ...
0
votes
1answer
1k views

are intel cpus beter for blender than amd cpus (no opinions aloud just facts) [closed]

I see Xeon and I7s in the top ten benchmarks for cycles in the Mike pan Benchmark for cycles the best single cpu was the i7 3930K it got a time of 2 minutes And it is a 60 Gflops cpu I have a amd a8 ...
3
votes
1answer
1k views

Use all Ram on Blender when rendering? (Cycles and Blender Render)

I have 32 GB Ram on my computer, how can i make Blender use all (or at least, the most) of the RAM when rendering?
1
vote
0answers
58 views

Blender 2.73a won't start [duplicate]

Downloaded the newest version, 2.73a, twice. Each time the download seems to go well, but when i start the program it opens only for a second then closes. It does this repeatedly. Using Win8.1. ...
2
votes
2answers
889 views

Is the VSE multi-threaded?

So I am thinking of doing an AMD build with the fx-8370 and want to use Blender's video editing component for video editing but I do not know if it will utilize all eight cores. Should I look to ...
0
votes
0answers
203 views

Adaptative sampling on Cycles

I have a scene I want to render where a small object moves across the camera's field of view. The rest of the scene is just a black void containing absolutely nothing (see image below). I need to ...
0
votes
0answers
657 views

Animation in viewport suddenly becomes very slow

I was working on a grass animation with a wind force field. First the animation in the 3D view was running at normal speed (~20 fps) then I adjusted a few settings like Stiffness and Bending. And now ...
3
votes
3answers
1k views

Reducing viewport slowness while working on a .blend with lots of particles?

I wonder to know if there is a way to dramatically reduce blender slowliness while working on a .blend with lot of objects/particles on a slow PC. I'm using BI. I'm looking for more tricks than the ...
3
votes
1answer
698 views

How can I disable one OpenCL device

I have successfully enabled the experimental OpenCL support and my scene (surprisingly) renders fine, without any crashes or artifacts. My setup consists of two AMD cards and an Intel CPU. Choosing ...
2
votes
0answers
414 views

Blender freezes just after opening [closed]

I started a discussion here, but no working answers: Blender Freezes I downloaded blender-2.72-linux-glibc211-x86_64 from blender.org/download for Ubuntu. I extracted using the default archive ...
5
votes
1answer
701 views

Which is more efficient? duplifaces, particles, or group instances?

Particles give more controls for doing things like randomizing rotation of instances, but duplifaces and group instances allow for rotation and scale of individual instances. For something like ...
3
votes
2answers
227 views

Python performance without Blender operators

After reading some posts here, i try to avoid using operators in order to avoid useless scene.update slowdown. Unfortunatly i still have a slowdown when creating multiple objects in blender, here is ...
2
votes
1answer
873 views

Is there any advantage to using child particles with object particles?

Child particles can help give the appearance of many particles without slowing things down too much, which is especially useful when the particles will be combed or simulated. But what about when ...
1
vote
1answer
738 views

Will running Blender on RAM Drives increase Blender's “Speed”?

What I am referring as a RAM Drive is http://en.wikipedia.org/wiki/RAM_drive. If I Install Blender on a RAM Drive, would it increase Blender's "speed"? Additionally, since "speed" is a very loose word,...
1
vote
3answers
1k views

Speedup Cycles for material-only renders

I render planes with procedural materials and don't need any other effects in those renders. The preview is generated within seconds but the final render takes minutes. What and how should I disable ...
17
votes
4answers
22k views

How to configure blender so that it uses only 50% of total CPU when rendering?

I need to render a very computer-intensive scene using cycles and for some reasons, I decided to use my home computer (i5 3.30 Ghz, 10 GB RAM, 2TB Hard Drive) to render it. However, the problem is ...
5
votes
2answers
450 views

Does Cycles use a Camera Frustum check?

So, in a random tutorial (I can't find it atm) Andrew Price mentioned that Cycles will render all geometry/particles, even if they are not visible to the camera; This suggests that Cycles doesn't use ...