GPU render experience

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chafouin
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Re: GPU render experience

Post by chafouin » Tue Oct 27, 2020 7:08 pm

Thanks B.Y.O.B for chiming in! This is absolutely not off-topic, because my main issues are about GPU final rendering with CUDA and Optix, not GPU viewport.

And this happens with 1920*817 on a GPU with 12GB of VRAM, so I don't think it's only a big resolution problem. I'll turn on the tiled rendering, see if it helps.

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B.Y.O.B.
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Re: GPU render experience

Post by B.Y.O.B. » Tue Oct 27, 2020 7:47 pm

Ah, I have misinterpreted your first post.
chafouin wrote:
Tue Oct 27, 2020 7:08 pm
I'll turn on the tiled rendering, see if it helps.
BlendLuxCore always updates the whole film, even when tiled rendering is used.
This is because we don't get a message each time LuxCore is done with a tile, so we can not react to that on a per-tile basis.
This means if the slowness of the full-film update is the issue, using the tiled render engine in LuxCore will not help.

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Dez!
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Re: GPU render experience

Post by Dez! » Wed Oct 28, 2020 1:47 am

Yesterday I worked at Luxcore and I understood why the viewport slows down when pre-rendering.
It's all about the lighting. If you leave 1 or 2 light sources, the viewport is fast. If you have many light sources in your scene, moving objects will be difficult.
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Sharlybg
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Re: GPU render experience

Post by Sharlybg » Wed Oct 28, 2020 10:26 pm

I don't Know what happen under the hood of the lastest daily build but viewport GPU performance seems to be Very good.
i have tested with different scene interior exterior heavy vegetation and the responssivness is MIND blowing :D I'm able to turn arround with Fullscreen
Viewport render.

I can also change material and light setting with great ease compared to past experience.
Can anyone confirm i'm not just dreaming ? ;)

But the crash bug related to switch is there ramdomly.

last build ; https://github.com/LuxCoreRender/BlendL ... tag/latest
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Sharlybg
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Re: GPU render experience

Post by Sharlybg » Wed Oct 28, 2020 11:12 pm

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B.Y.O.B.
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Re: GPU render experience

Post by B.Y.O.B. » Wed Oct 28, 2020 11:28 pm

There were no changes that could affect this as far as I know, so it is most likely specific to this scene.

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Sharlybg
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Re: GPU render experience

Post by Sharlybg » Thu Oct 29, 2020 10:06 am

B.Y.O.B. wrote:
Wed Oct 28, 2020 11:28 pm
There were no changes that could affect this as far as I know, so it is most likely specific to this scene.
Strange i have another interior where it worked better.
Or it is related to RTX card update.
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DionXein
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Re: GPU render experience

Post by DionXein » Fri Oct 30, 2020 9:44 am

Sharlybg wrote:
Sat Oct 24, 2020 8:22 am
Btw 2.5 have nasty bug with blender crash when switching between solid view and rendered view.
Hey, I found that after once rendered image this problem disappear.

mischterlampe
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Re: GPU render experience

Post by mischterlampe » Mon Nov 23, 2020 4:53 pm

Hi,

I figured out a small workaround. If you select a few lines in the console
console.PNG
and you wait a little bit (up to a few minutes), blender gets responsive again. Rendering is going on, the rendering viewport is not updating, but you can move inside the image and work with blender.
If you want to fo back, so the rendering is updating, click inside the console and press "ESC" and wait a little bit.

I think this is helpful if you renderings will take some time.

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