Questions tagged [memory-management]

Questions related to memory consumption. This refers to both RAM (Random Access Memory) usage and hard drive space.

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25
votes
2answers
9k views

Why does Blender use so much memory for large textures?

Using a single 6K texture at only 227kb in size, spikes the memory usage to a crazy 144mb of memory in Blender. It was brought up in this bug report, but closed. Why can image editors (Photoshop/...
7
votes
1answer
3k views

Is it possible to use a displacement map without having real geometry?

I'm currently trying out displacement maps. As I was told by some video tutorials I need to apply them as a (displacement) modifier on the mesh. Therefore, I have to subdivide the mesh to achieve more ...
3
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2answers
2k views

Why does Denoising take up so much memory?

I tried to render my scene with the new 2.79 Denoiser. During the Rendering Process everything was fine, my memory peak was about 1000M but as soon as the Denoising started it suddenly shot up to ~...
11
votes
1answer
5k views

How can I save memory in cycles when I have a lot of duplicates?

I have a scene I'm working on which requires a large amount of duplicates which I was planning to use an array for. I recently heard if you use Shift+D instead of Alt+D and wondered if there was a ...
5
votes
1answer
4k views

How to prevent memory leakage in Blender?

I have to load lots of objects/meshes(50k) in Blender and render them for which I have written a Python script. My meshes have lots of vertices/faces (in the range of ~[10k, 70k]). I noticed that ...
5
votes
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 ...
7
votes
1answer
2k views

How to avoid float texture limit for GPU rendering

In developing a relatively simple scene, I noticed that detail from normal maps were not being displayed for some objects. All of the maps were generated from Substance painter as .png (16-bits max). ...
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 ...
3
votes
1answer
3k views

Troubleshooting Blender's Memory Use (Memory Statistics)

I've got a model I've been working on for a few weeks here. The file itself is 2.1Mb and there are no textures used. Although the full model is 3 million polygons, it's all subdivision and mirroring ...
2
votes
1answer
413 views

How to remove unwanted textures to save memory

I have two textures in Blender that are for a desk I am modeling. Each texture is 4K quality and takes up a ton of memory. I only have 4GB of memory on my computer, so I can't render an image of my ...
1
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2answers
4k views

How do I delete unused data? [duplicate]

I want to quickly minimize the size of a Blender file. How do I delete any data that is not being used?
11
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1answer
4k views

Why should texture resolutions be powers of 2?

It's often said that texture dimensions should be square powers of two (512x512, 1024x1024, 2048x2048...), but what is the purpose of this really? I've given this advice myself and do it whenever I ...
6
votes
1answer
6k views

Import large model file into Blender

I have a 530 MB .ply mesh file that I am trying to import into a Blender project. However since the file is so large, Blender freezes up whenever I try to import it. Is there a way to work around this?...
5
votes
2answers
16k views

Best settings to reduce cycles memory consumption

I'm trying to render a very complex scene with blender and it seems to be using too much memory. I've already tried using tile size as a multiple of total resolution and spatial bvh splits. Can ...
8
votes
1answer
2k views

How do I see what is using Memory?

During the creation of a recent project the amount of memory used by Blender inflated to a massive(!) 11.8GB while attempting to render. This makes rendering on GPU unusable for me (no Titan X's ...
3
votes
1answer
3k views

Blender error: out of memory

I have never used Blender, so I'm totally new to the software, but today a friend of mine asked me to use my computer to render a picture for him since he doesn't have a powerful PC. So he gave me the ...
3
votes
0answers
394 views

.blend file size much larger after OpenGL Render

I am working on a detailed dialogue scene that is 600 mb. It is a very complex scene, with each part in single layers. I know that is a very big file size, but what my machine can handle it. What ...
3
votes
1answer
869 views

Blender using memory for no reason; Blender loading up Memory Usage. Why is that?

So there's actually 2 problems I have regarding Blender's memory usage, which probably aren't much for a regular computer but really slow work for weaker ones and can even cause crashes. So I have a ...
2
votes
0answers
1k views

Is there an easy way to see what is consuming the most memory?

Is there an easy way to see what is consuming the most memory? For example: -Objects / Object data -Textures -Lighting -Particle Systems -Material duplicates -Caches -Anything else that can cause ...
2
votes
1answer
125 views

Keeping Shaders in Memory

Is it possible to make Blender keep shaders in memory instead of reloading them each time I switch back to lookdev or render view? I am losing a lot of time switching between the views simply because ...
1
vote
1answer
3k views

When Blender crashes during rendering

After asking a good number of questions, I felt it best that I come with some tips that I have discovered and learnt on my own. One of the things I've heard is that there are people that have tried to ...
0
votes
1answer
398 views

Poor Undo Performance: Blender 2.9

I'm having issues with Undo locking up Blender on the first undo action following some action. This happens whether I remain in one mode, or on one obj. Basically say I rotate a joint and I don't like ...