After using the GPU effects

Szalam, if possible, I'd like some information in what concerns this topic because I'm having a moment a little hard to get my head around how After Effects uses the GPU in some situations.

For example, I have a comp UltraHD quite complex with a group of layers 3D element. Because we work closely with the 3D with element layers, we have the rendering engine in After Effects "3D Classic" on. Because I'm using a GPU K4200, I'll just follow the advice of Adobe and use the CPU for any trace of the rays since the K4200 is "unsupported".

So now that I'm assuming that After Effects will do all THE processing of treatment on the CPU - with the exception of the work of 3-d element, which will be done only on the GPU, correct? Then now, I guess as long as I "simultaneous rendering of several images multiprocessing" something sensible (i.e. leaving 1/4 or preferably more like 1/3 of the available RAM to non - After Effects-related work and not hungry processors), then After Effects will try to max-out the processors as much as possible for everything except the item in 3D work (which will be hopefully out the GPU max). Is this correct?

Is it interesting to use in load/no tested (for example the K4200) GPU to accelerate the raytraced render engine in this scenario (i.e. 3D only in the model elements are 3D, element, cameras and lights 3D layers), or is it better to leave it on the CPU and leave the single GPU for 3D element?

Thanks in advance!

Chris Hocking wrote:

For example, I have a comp UltraHD quite complex with a group of layers 3D element. Because we work closely with the 3D with element layers, we have the rendering engine in After Effects "3D Classic" on. Because I'm using a GPU K4200, I'll just follow the advice of Adobe and use the CPU for any trace of the rays since the K4200 is "unsupported".

Right. Your scene does not all the layers using the ray traced in her rendering engine at all, so leave it on Classic 3d is the best choice. The new version of the item has "drawn with RADIUS' shadows and whatnot, but which is unrelated to converter traced to obsolete radius of EI. EI raytraced render engine is essentially an effect pressing the Optix of NVIDIA GPU library. It was just to add depth to layers. People are often confused and think that turning traced to the rendered RADIUS on would hire the GPU to make this, but the only thing he never accelerated has been traced to the RADIUS effect (which has very few people have already used).

Chris Hocking wrote:

So now that I'm assuming that After Effects will do all THE processing of treatment on the CPU - with the exception of the work of 3-d element, which will be done only on the GPU, correct?

Yes.

Chris Hocking wrote:

Then now, I guess as long as I "simultaneous rendering of several images multiprocessing" something sensible (i.e. leaving 1/4 or preferably more like 1/3 of the available RAM to non - After Effects-related work and not hungry processors), then After Effects will try to max-out the processors as much as possible for everything except the item in 3D work (which will be hopefully out the GPU max). Is this correct?

Pretty much, Yes. There are other potential bottlenecks (if you use images out of an external device with a slow connection, for example), but it's like basic things will be.

Chris Hocking wrote:

Is it interesting to use in load/no tested (for example the K4200) GPU to accelerate the raytraced render engine in this scenario (i.e. 3D only in the model elements are element and 3D & cameras lights 3D layers), or is it better to leave it on the CPU and leave the single GPU for 3D element?

Your scene, as you describe it, does not use the ray-traced rendering engine at all. The ray-traced rendering engine is just a way to add depth and dimension to natively layers in AE. Given that you do not use this feature, by turning your comp to use the rendering engine raytraced won't help what whatsoever and, instead, plu cause lead the times.

But you can feel free to test yourself. Try a rendering with the standard rendering engine and with the renderer raytraced lit. See if you can see differences.

Here is an official blog of Adobe on the GPU in AE: features GPU (CUDA, OpenGL) in After Effects

Tags: After Effects

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