Questions tagged [opencl]

Open Computing Language (OpenCL) is a framework for writing programs that execute across heterogeneous platforms consisting of central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), field-programmable gate arrays (FPGAs) and other processors.

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Ugly stripes when rendering with GPU, even with high samples

I came across a problem which I couldn't find any solution through google. With my new GPU (R9 390X) I get when rendering with it, distinct stripes, especially in darker areas. Does anyone know the ...
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0answers
577 views

Horizontal Render Artifacts When Using OpenCl

I've just started rendering with my new AMD GPU and realized that I'm getting some strange horizontal line artifacts. As you can see, in the box on the right, there are strange blue lines, and all ...
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383 views

OpenCL won't work for cycles, Mac

I just started usuing cycles render on a Mac, and Was told GPU rendering is much faster. The only problem is that the GPU rendering never happens it just makes a light grey and dark grey checker board,...
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0answers
631 views

Cycles on AMD takes abnormally long time to render

Since I upgraded to the latest version of OS X and Blender 2.76, I was looking forward to finally being able to use GPU acceleration with my AMD card. Instead, using the BMW benchmark scene, it is now ...
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113 views

Query on OpenCL 2.0 support

Does the Blender-2.76 support any of the OpenCL 2.0 features like SVM, C11, atomics, etc … ? I would like to know whether you plan to support the 2.0 in upcoming releases? Thanks, Srinivas
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0answers
853 views

Cycles OpenCL on a OS X?

I'm trying to get Blender working with OpenCL on a Mac but I get errors during the run (it tries to do compilation first and that fails).
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2answers
519 views

GPU rendering no light penetration in large scene

When i am rendering in cycles large scene (not really, 470k verts) in GPU mode there is no light penetration through holes and glass, even if i render with 10 samples. In small scene (<80k verts) ...
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1answer
2k views

How to enable GPU rendering with my Radeon card in Linux?

I am currently running Ubuntu 15.04 64-bit on a machine with a Radeon R9 270X GPU. I've grabbed the latest 64-bit Linux build from this page (currently 2.75-a08f8a4) and I have installed the latest ...
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0answers
61 views

Blender 2.75a: No Compute-Device for Cycles under GTX 750 Ti [duplicate]

I'm using Ubuntu 14.04 LTS, with a brand-new graphics card, GTX 750 Ti. I have even updated the drivers, but for some reason Blender (2.75a) doesn't seem to be allowing Cycles to render with my GPU. ...
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1answer
2k views

OpenCL build failed on AMD R9 290 - Insufficient Private Resources

I'm running Blender on windows. Recently I tried to use GPU rendering with my AMD R9 290, but upon rendering, I get an error reading "OpenCL build failed: error in console." Meanwhile, in the console:...
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1answer
1k views

Support is planned OpenCL 1.0 in Cycles?

I have an AMD graphics card (HD 5830), but the rendering runs on the CPU, because Blender not see my graphics card. I think that it will render faster on the GPU than the CPU. UPD: I waited the ...
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2answers
3k views

How to enable openCL rendering in Blender 2.75 rc2

I'm using Linux Mint and I was trying to enable GPU rendering, but I still have only CPU option in user preferences... Linux Mint 17.1 x64 Radeon HD 7850 Blender 2.75 rc2 amd-catalyst 15.5 ...
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1answer
12k views

Is it possible to do OpenCL rendering on Intel processors?

Intel processors have supported OpenCL for a long time now; latest versions (Haswell and above) support OpenCL 2.0 or better. Why don't we have a GPU rendering option when using Blender on these ...
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4answers
201k views

Enabling GPU rendering for Cycles?

I want to enable GPU rendering, but there is no option in User Preferences > System: Why is this? How can I get cycles to render using my GPU?
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1answer
1k views

Why is “Smooth” shading slower than “Flat” shading in the viewport?

When I set a Mesh to shade as "Smooth" vs "Flat" on a high-poly Mesh Object (such as one with a subdivision modifier), it makes Blender much slower than normal, sometimes almost unusable. Why does ...