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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5
votes
2answers
918 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 ...
1
vote
0answers
120 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,...
24
votes
6answers
17k views

How to make VSE render faster?

I'm putting together a video from the VSE. In the sequencer window it is rendering and scrubbing at near realtime yet during output it is taking around 3x longer. The frames are taking 0.13 seconds ...
11
votes
3answers
10k views

Why is rendered viewport faster than rendering individual frames?

When I'm using rendered viewport it initially takes a while before rendering starts, but once it does, I can freely move around and rendering a new view happens almost instantaneously. When on the ...
0
votes
1answer
3k 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 ...
3
votes
2answers
365 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 ...
23
votes
1answer
7k views

Python performance with Blender operators

In my script, I have for loop over many cube objects (~1000) and the treatment is very slow. Looking more in details, I notice that in the same amount of loops: if ...
2
votes
1answer
125 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 ...
7
votes
3answers
19k views

How can I tell if Blender is using all 64 GB of RAM?

I have 64GB of RAM on my computer and I'm trying to check if Blender is using all that it can. I still get viewport slowdown at times when working with complex objects. I know there are many ...
19
votes
3answers
30k views

How will multiple GPUs improve Cycles' rendering performance?

I have an NVIDIA Titan GPU and I'm able to add another card, but I wonder whether Blender will benefit from more than one GPUs? Should I do it as SLI or should I just do it as an added card? I just ...
2
votes
2answers
6k views

How do you optimize Blender/mesh for sculpting with multiresolution modifier?

When I sculpt using Multirezolution modifier I use the following tricks: I start with a base model which has 1000-5000 vertices For each subdivision level I try to finish all work which can be done ...
5
votes
2answers
13k 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 ...
24
votes
4answers
13k 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 ...
10
votes
6answers
36k 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 (...
2
votes
1answer
4k views

General system specs for large scenes in blender [closed]

What are the system requirements for working with complex geometry in Blender? Things like RAM, GPU, CPU etc.?
9
votes
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 ...
0
votes
1answer
7k views

What are the best graphics cards for cycles? [closed]

I'm considering having a system build solely for rendering for cycles (as kind of a single PC renderfarm). Since the GPUs would be most important here, I plan on having it build around those. I was ...
-3
votes
1answer
1k 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 ...
8
votes
4answers
4k 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. ...