LuxCoreRender Forums

Hi all,

I'm always hitting the GPU card's memory top with my renders (8GB gtx 1070).

I also work with octane, but I cannot switch to Luxrender at work because I always get rid of memory at the middle of the project.
I've made some comparisons (also with CPU).

My first test is with only meshes:
Cycles also has a big memory usage, but the problem now to me is Luxcore.
As you can see, it uses more than twice than octane. On a big scene is a big problem.

This is the test scene:

Luxcore:
https://www.dropbox.com/s/eiixmn31fti19 ... blend?dl=1

Appleseed:
https://www.dropbox.com/s/3kygy8hcbpthw ... blend?dl=1

Cycles 2.79:
https://www.dropbox.com/s/zsap2a1xq0jnh ... blend?dl=1

Lightwave 2018.0.7 with octane:
https://www.dropbox.com/s/n8bda1xm3338r ... e.zip?dl=1

Model is from Stanford 3D Scanning Repository, of course.

Best regards

It's actually pretty cool how close cycles and luxcore got. Not too long Ago luxcore was way worse with memory consumption. But yes, octane seems to be quite a bit more optimized.
But octane Also has no fallback option Once you run out of Vram, it's gpu or use another renderer. Both cycles and luxcore can use cpu...

Will be more representative to see how they deal with GPU memory on textured scene. thanks for the test

Tip: if you change "?dl=0" at the end of dropbox urls to "?dl=1" you get a direct download link.

lacilaci wrote: ↑Thu Nov 22, 2018 7:22 pm It's actually pretty cool how close cycles and luxcore got. Not too long Ago luxcore was way worse with memory consumption. But yes, octane seems to be quite a bit more optimized.
But octane Also has no fallback option Once you run out of Vram, it's gpu or use another renderer. Both cycles and luxcore can use cpu...

Haven't tried yet, but there are options for out of core.

Thanks for replying.

Sharlybg wrote: ↑Thu Nov 22, 2018 7:41 pm Will be more representative to see how they deal with GPU memory on textured scene. thanks for the test

This is my next step, but after a few days, because I have to work all weekend.

Thanks

B.Y.O.B. wrote: ↑Thu Nov 22, 2018 9:53 pm Tip: if you change "?dl=0" at the end of dropbox urls to "?dl=1" you get a direct download link.

Thanks for the tip! Changed!

@Asticles: you should investigate how the memory increase:

1) increasing triangle count;

2) texture images;

3) increasing rendering image size;

4) etc.

There is usually a fixed memory cost plus a variable cost while scaling up one of the above items. If the scene is too simple, you may be just measuring the fixed cost (i.e. usually not very importante) and note the variable cost (i.e. far more important).

P.S. I will get out of fixing stuff in TILEPATH, first or later, and I will check this topic too.

Well have tested the same scene but with a 4k 16bit color png on the background wall.