Basic Nature Test

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zareami10
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Basic Nature Test

Post by zareami10 » Fri Apr 10, 2020 3:16 pm

Been a while that I wanted to test some basic nature scenes in Lux, and now it's easier than ever thanks to it being able to use simple Cycles nodes, so I gave it a try. The only problem I hit was OpenCL basically filling my whole RAM and half of swap files and then crashing (some 24GB in total) despite CPU and Cycles on GPU (CUDA) working just fine without even needing any swap.

Around 100K particles and 8.5M vertices.
Image
Image
Last edited by zareami10 on Tue Jun 30, 2020 10:38 pm, edited 1 time in total.

Racleborg
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Re: Basic Nature Test

Post by Racleborg » Fri Apr 10, 2020 4:30 pm

Looks lovely! :)

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B.Y.O.B.
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Re: Basic Nature Test

Post by B.Y.O.B. » Fri Apr 10, 2020 4:41 pm

Looking good!

arescet
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Re: Basic Nature Test

Post by arescet » Fri Apr 10, 2020 5:37 pm

the blurred background really adds to the mood, nicely done!

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Sharlybg
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Re: Basic Nature Test

Post by Sharlybg » Fri Apr 10, 2020 5:49 pm

That is really nice and will be nice in the gallery. I'm a bit concerned about the high memory usage. Normally opencl compilation happen just one time for first render in 2.4 alpha but the displayed message wasn't update yet.
8.5 million vertices seem small to me. I wonder why it took so much memory.
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PetrT
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Re: Basic Nature Test

Post by PetrT » Fri Apr 10, 2020 11:13 pm

Looks awesome

Luximage
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Re: Basic Nature Test

Post by Luximage » Sat Apr 11, 2020 6:39 am

Superb image, loving it.

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Dade
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Re: Basic Nature Test

Post by Dade » Sat Apr 11, 2020 8:54 am

Sharlybg wrote:
Fri Apr 10, 2020 5:49 pm
I wonder why it took so much memory.
It is something we have already seen: particles are like any other object in LuxCore and there is a fixed (memory) cost for each object. This cost is small and negligible for normal meshes but start to be a noticeable overhead if the object is very simple (few triangles). For instance, a work around, is to not instantiate the single blade of grass but a small tile.
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lacilaci
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Re: Basic Nature Test

Post by lacilaci » Sat Apr 11, 2020 10:25 am

Dade wrote:
Sat Apr 11, 2020 8:54 am
Sharlybg wrote:
Fri Apr 10, 2020 5:49 pm
I wonder why it took so much memory.
It is something we have already seen: particles are like any other object in LuxCore and there is a fixed (memory) cost for each object. This cost is small and negligible for normal meshes but start to be a noticeable overhead if the object is very simple (few triangles). For instance, a work around, is to not instantiate the single blade of grass but a small tile.
Hmm, but 100k particles arent much and 8.4m poly is nothing.
There might be a problem in hows the scene setup thhough.

zareami10
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Re: Basic Nature Test

Post by zareami10 » Sat Apr 11, 2020 10:45 am

Thanks everyone! :)

Sharlybg wrote:
Fri Apr 10, 2020 5:49 pm
That is really nice and will be nice in the gallery. I'm a bit concerned about the high memory usage. Normally opencl compilation happen just one time for first render in 2.4 alpha but the displayed message wasn't update yet.
8.5 million vertices seem small to me. I wonder why it took so much memory.
There are many high-res textures so it's explainable to a great degree, but I'm not aware of the technical details so not sure why OpenCL needs so much more memory compared to CUDA for example (roughly some 50% more without any textures for example).
But yes I feel like 16GB of ram is pretty much nothing both for Blender itself and render engines these days.

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