31
votes
How can one do rendering with Cycles using an NVIDIA RTX GPU?
Update as of July 29th 2019: NVIDIA RTX GPUs are now officially supported and can be used to accelerate renderings in Cycles using the raytracing cores of RTX cards. You can read more about this from ...
- 3,062
16
votes
Accepted
GPU compute grayed out
Go to "File"->"User Preferences" and click on the "System" tab. On the left it should say "Cycles Compute Device". On my machine (I have the same card) when I change from "None" to "CUDA" the GPU ...
- 316
14
votes
Accepted
Does Blender support dual-GPU rendering if the two GPUs aren't the same?
You can use multiple different GPUs for rendering, as long they are from the same brand (AMD, NVidia, or Intel) you should be able to use them simultaneously to render in Blender Cycles.
As of Blender ...
- 60.7k
13
votes
Why can't I use GPU rendering in Blender?
Blender Cycles relies on GPU compute languages like CUDA or more recently OpenCL. CUDA is exclusive to Nvidia and while OpenCL is technically cross platform, in practice AMD's implementation is the ...
- 1,630
13
votes
Accepted
Rendering on command-line with GPU?
The following script allows you to enable all GPUs and optionally all CPUs as well.
...
- 25.9k
13
votes
AMD GPU Material in "material preview mode" and "rendered mode", is entirely gray as background. Only outline is displayed
Update: Blender 2.92.0, 2.91.1 and 2.83.11 will contain workarounds for the missing / incorrectly rendered surfaces of mesh, curves and metaballs as well as the incorrectly rendered wireframes caused ...
- 25.9k
12
votes
Why can't I use GPU rendering in Blender?
I'm quite surprised at the amount of false information here.
First off Intel does indeed support OpenCL, as far as I can see up to 2.1. Not only this, but I have actual field experience with ...
- 260
12
votes
Accepted
Can you render using the CPU with Eevee
The Blender EEVEE render engine uses OpenGL for all the rendering, so YES, rendering on the CPU should be completely doable, as long as a viable CPU-based OpenGL implementation is also installed and ...
- 1,607
12
votes
Is it possible to render a movie on a single computer in blender?
It is possible to render a movie on a single computer. It depends on what movie it is. If you choose a style that renders extremely fast, it is possible. Nothing like the ones Disney make though. Not ...
- 26.4k
11
votes
Accepted
Why can't I use "GeForce 9500 GT" for GPU rendering with Cycles?
The NVIDIA GeForce 9500 GT is from the GeForce 9 series, which doesn't fulfill the minimum requirements for Blender 2.8x.
Supported Graphics Cards
NVIDIA: GeForce 400 and newer, Quadro ...
- 25.9k
11
votes
AMD GPU Material in "material preview mode" and "rendered mode", is entirely gray as background. Only outline is displayed
As mentioned in the bug report T82856 a temporary solution is to enable High Quality Normals under the Performance section in the Rendering tab on the right in a default Blender layout.
- 111
10
votes
Why does Denoising take up so much memory?
Like Cegaton said, it uses the other tiles in the memory. Using that logic, I ran a test, and found that if you reduce the tile size (in the performance pulldown) the image renders using much less. My ...
- 153
9
votes
Accepted
Can the GPU be used while video editing
No there is no GPU assist for the VSE (sequence editor) and before you ask, no you can't have more cores either. You can make an OpenGL render (without audio IIRC) though. If you look at an OS task ...
- 9,003
9
votes
Accepted
Loading render kernels - what exactly that means?
Cycles Blender kernels are software libraries containing the computing routines necessary to produce the rendered images.
From the Blender Wiki
The kernel contains the core rendering routines, where ...
- 60.7k
8
votes
Accepted
How can one do rendering with Cycles using an NVIDIA RTX GPU?
You cannot enable it since it is not yet supported. You will need to wait until it is, or attempt to build Blender with the support for Cuda 10 yourself apparently.
- 26.4k
8
votes
Mac Pro Tower - Sapphire Radeon Rx580 is really, really slow
Unfortunately Apple has deprecated OpenCL and OpenGL in favor of their own Metal API. In fact, Blender has recently dropped OpenCL support on macOS completely, due to too many bugs in the macOS OpenCL ...
- 158k
7
votes
Why/how does tile size effect performance?
One thing not mentioned that is important for efficiency on multi-core hyperthreaded machines is the time cost of "tile stragglers." My machine has 12 cores and will spawn 24 rendering threads which ...
7
votes
Blender Can't detect 3D hardware accelerated Driver
You should get "software" OpenGL:
Go to this link: http://download.blender.org/ftp/sergey/softwaregl/
Pick your OS version (86/64).
Put the opengl32.dll file into your top Blender installation folder ...
- 181
7
votes
Accepted
How do I get Cycles to use GPU on a linux server?
For enabling the device for use, see bpy.context.user_preferences.system.compute_device_type and
...
- 158k
7
votes
What is GPU tile size contingent upon?
The infamous answer to this question is:
It depends
The 256 x 256 recommendation that is given many times is a very good starting point. In general it will lead to decent render times and sufficcient ...
- 11.2k
7
votes
Accepted
Use Blender Cuda Build to use GPU in Simulations:
I think you've misunderstood the description for that build. It is merely stating what features were enabled at compile time. It's possible to build Blender without some things, such as the smoke ...
- 9,152
7
votes
Accepted
Scene complexity and VRAM
I bet those 4x8GB gpus are much faster than single 32GB card. Here are some options:
Get the faster setup and a renderer that can do out-of-core rendering like Octane or Redshift. This allows your ...
- 51.3k
7
votes
Accepted
Why do volumetrics render noisier when using GPU then when using CPU in Cycles?
The following answer is based on a Twitter thread by Stefan Werner.
Volumetric rendering on the CPU can be less noisy with fewer samples, because Cycles uses equi-angular sampling. This importance ...
- 25.9k
6
votes
CUDA error: Out of memory in cuMemAlloc(&device_pointer, size)
There are two options.
First:
Your scene render is bigger then your GTX 960 memory.
Solution:
Change render to CPU.
Second:
You have active 'render preview mode' and 'final render' at once.
...
- 17.6k
6
votes
Extreme CPU usage while GPU rendering?
I'm certainly no expert, but I had a 95% CPU usage whilst rendering, even though I had chosen GPU Compute from the Render section. What I didn't realise, was that I also need to select CUDA in User ...
- 161
6
votes
Why can't I use GPU rendering in Blender?
The GPU option doesn't show because you don't have a supported dedicated GPU. Intel HD graphics is an integrated graphics solution, which realistically won't work with Blender. Ivy Bridge is the name ...
- 1,580
6
votes
How to make CUDA work in Ubuntu so as to enable GPU rendering in Blender?
After long trying I could solve this problem
I found out that my NVIDIA card was not being recognized by the NVIDIA driver I had installed. So NVIDIA X server settings was "empty" like in this thread:...
- 165
6
votes
How to make CUDA work in Ubuntu so as to enable GPU rendering in Blender?
I found the same problems a few days ago, in my case the solution was to install the nvidia-cuda-toolkit pakage.
sudo apt-get install nvidia-cuda-toolkit
- 106
Only top scored, non community-wiki answers of a minimum length are eligible