animation settings

[daros]

Hi To all.
I'm currently struggling to find some decent parameters for the animation of spaces with artificial light only, using light caching.
I prepared a simple scene if someone wants to help me with the tests, which you find attached.
The layer poj-black should be absolute black
The rendered scene should look like this

I would be happy even with a zero caustichs result, important the sequence renders fast and shows up relatively stable at 128 samples/pixel.
Thanks for any input!

[epilectrolytics]

What is to be animated, cam, spotlight or the sculpt?
You provide no blend but an object file, so the materials have to be guessed.

In case the lights are not animated, it should work simply with Indirect Light Cache.
I'm assuming the walls are matte but the floor is glossy and are excluding it from the light cache (uncheck in material output node).
Then I'm rendering the first frame with persistant indirect PGI and DLS caches, then unchecking persistance so the caches will be used for all frames, providing stable lighting.
Animating the sculpt (rotation) I'm rendering 160 samples per frame with GPU and light tracing for the caustics but no caustics cache, OIDN denoiser.
Using MacBook M3 Pro with 14 GPU cores for path tracing and 2 from 11 CPU cores for light tracing, Blender 4.3 with BlendLuxCore 2.10.
I have replaced the emitting spotlight with a simple area light.

Here's the file (cache paths won't work on another computer) and a short clip:

space2.zip

(704.55 KiB) Downloaded 274 times

[daros]

Hi, epilectrolytics, thanks! your sample animation looks very stable, wonderful.
Now a further big favour if you can. I'm not familiar with blender so i tried to install blender 4.1 + luxcore but i didn't suceeded, because my 4,1 installation do not heven shows up the extensions option. I use Luxcore from within our own inhouse app (felixrender) and the easiest way to implement your suggestions would be if you share with me the luxcore scene with the CFG file. So i can copy the scene settings directly to our app with ease.
If you don't have time, dont' worry, i wait till my programmers come back from holidays tuesday.
In the meanwhile big thanks for your help!

[CodeHD]

i tried to install blender 4.1 + luxcore but i didn't suceeded, because my 4,1 installation do not heven shows up the extensions option.

Hi daros,
The new LuxCoreRender v2.10 requires Blender 4.2 or 4.3 to work.
This is exactly as you noticed because of the missing "extension" option. This new system to replace "addons" was only introduced in Blender 4.2.

Blender 4.2 is also the currently latest LTS version, so this was the primary goal for compatibility of this version. Blender 4.3 should be fully compatible as well. Blender 4.4 may work but has not been thoroughly tested, so I would recommend 4.2 for the time being unless you explicitly need newer features of Blender.

[daros]

Hi, to all, i understand. Fortunately an other used sent me the Luxcore scene so i was able to implement it. Testing now!
Thanks for the isntruction regarding the latest luxcore blender!

[epilectrolytics]

I use Luxcore from within our own inhouse app (felixrender)

Oh I see.
I had another go using BiDir this time and got problems with the reflections of the wall caustics on the floor.
These are SDG-paths (specular-diffuse-glossy) and BiDir cannot resolve them in 128 samples so that it looks stable when animated.
But when using the caustic cache (this time with floor included) with a high threshold it worked, though rendering a bit slower.
Also it looks way better with all the reflections properly rendered than in my first attempt when they were omitted.
So here is another file, including cfg and movie clip:

[daros]

Hi epilectrolytics, sorry i replied to you without reading carefully what you wrote so i deleted it. Let me go trough your last post carefully and make some tests.

[daros]

Wow! We have to solve some minor issues which my collaborator Bartek will explain, however i'm very happy with the result. If it is stable like this at low-res and at 128 samples x pixel it means that at 4k we have a lot of tweak margin to increase speed.
This is with Bidir and photon gi caustichs so quality is very high.
Thanks epilectrolytics!

Documents.zip

(900.12 KiB) Downloaded 198 times

[daros]

32 samples x pixel.
We always apply a spatio-temporal denoiser which by sure contributes to clean up the result.

interior2.zip

(1018.04 KiB) Downloaded 232 times

[daros]

2K at 32 samples pixel

https://drive.google.com/file/d/1UAv2v8 ... sp=sharing