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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Weird bmesh performance when creating new vertices

I have 2 different meshes with roughtly the same amount of faces/verts. In the first case I only have 1 object in blend file, in second case around 80. This is the only difference I can think of, in ...
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1answer
1k 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 ...
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4answers
5k views

Blender becomes very slow with large amount of objects sharing mesh data

In my script I am importing a large amount of objects (+2500) but sharing the mesh data from one single primitive. While this has taken care of importing speed, it completely slows blender down. ...
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2k 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 ...
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1answer
778 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 ...
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1answer
520 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 ...
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2answers
3k 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 ...
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1answer
1k 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.
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0answers
288 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 ...
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2answers
845 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 ...
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3answers
7k 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 ...
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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 ...
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262 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 ...
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1answer
2k 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 ...
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1answer
4k 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 ...
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2answers
532 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 ...
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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 ...
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1answer
626 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....
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1answer
15k 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 ...
4
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1answer
558 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 ...
2
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1answer
509 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 ...
7
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1answer
2k 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 ...
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1answer
363 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 ...
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0answers
491 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: ...
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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 (~...
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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 ...
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1answer
1k views

Lagging audio playback in the VSE?

I'm editing some videos in the VSE with blender 2.7 and am experiencing pauses and lagging in audio, when I (AltA), which is driving me MAD! I've "proxy/Timecode" all video strips to 50% with build ...
2
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1answer
129 views

can textures and bumpmaps be “baked” into a single texture?

In Blender it seems bump maps tend to take longer to render, so I was wondering if it was possible to merge those into an image such as a UV map. is there a way to do this or a way to make bumpmaps ...
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0answers
59 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. ...
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1answer
3k views

What will speed up renders more effectively?- more cores or higher clock speed? [closed]

I am contemplating between the AMD FX6300 and AMD FX4350, the former being 6-core@3.5GHz and the latter being 4-core@4.2GHz http://www.cpu-world.com/CPUs/Bulldozer/AMD-FX-Series%20FX-4350.html http:/...
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0answers
714 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
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1answer
755 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
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0answers
433 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
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1answer
784 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
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2answers
270 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 ...
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1answer
866 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,...
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2answers
454 views

bpy.data.meshes.new gets slower and slower

I'm writing an importer add-on. It works, but it's slow. The first sub-file takes 15 seconds to import; out of it, 10 seconds are spent in bpy.data.meshes.new(). I timed it, and of course, it's fast ...
2
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1answer
4k views

Does Cycles GPU Rendering use Single or Double Floating Point Precision?

I am trying to choose a Graphics Card for rendering in Blender, I would like to know if Blender uses Single or Double Point Operations. I have been looking at Nvidia's GeForce and Tesla line of ...
5
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2answers
1k views

Maximum number of materials that can be added in a scene?

I have very large number of planes in my scene and each needs to be assigned a color, and to do that, I am assigning a material to each plane. Blender is allowing 2^15, i.e. 32768 materials. But the ...
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0answers
162 views

How to draw a colored point cloud from a .ply PCD file and render it? [duplicate]

To generate a point cloud i am using planes in blender, to compensate for unavailability of POINT data primitive. After reading the .ply point cloud file(PCD) the planes are added in the blender scene,...
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1answer
4k views

Laptop requirements for Blender [duplicate]

I have recently downloaded Blender. But because my laptop is old i'm thinking of buying this HP Laptop (Pavilion 17-e100sv) with these characteristics: Intel Core i3-3110M Processor-2.40 GHz RAM: 4 ...
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2answers
458 views

Are render passes always rendered?

It would seem that the answer at least partially no, as rendering a simple cube scene with no passes enabled takes 3 seconds, while with all passes enabled takes 9 seconds. I always imagined that ...
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2answers
15k views

How can I improve viewport performance when using Dyntopo?

I'm doing a Blendercookie course on how to sculpt a Scifi weapon with dyntopo. The fact is that when some piece reach a certain level of compleiity (about 1.1 million tris) the systems starts to lags ...
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1answer
2k views

How can I get faster render times for a single image? [closed]

When rendering a single frame, either by pushing F12 or from the Properties → Render menu, is there any way to speed up the process? I know about rendering animation through the Python console to ...
9
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1answer
2k views

How to efficiently instantiate object with memory-hungry modifiers?

Using Alt + D to duplicate light meshes with heavy modifiers (like a leaf with a particle instance modifier or a trunk with a subdivision modifier) can lead to huge memory usage. Because only the base ...

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