Blender LuxCore Essential Tips | Speed Up LuxCore Production Workflow

[@chj.schwarz]

will miss the premiere but can't wait to watch it tomorrow

[@HilleCine]

Thank you for this, my 3rd time getting back into Blender. Just discovered Luxcore by chance and compared with cycles a quick test with my orange juice bottle project luxcore blew it out of the water, like wow looks soooo much better. Liked and subbed as I want to learn luxcore as for a free renderer it's giving incredible results.

[@HilleCine]

Hmmm damn, I have a 3090 and 5900x and my render times are sloooooooooooooow with luxcore compared with cycles slooooooooooooooooooooooooooooooooooooooooooow. Going to deep dive with all your videos, thanks again mate

[@djtutorialscgi]

Depends on the settings. Keep in mind that LuxCore is considered a lot more physically accurate so it will take longer especially when using light tracing since it is CPU bound.

[@djtutorialscgi]

Glad you are enjoying the vids!

[@CsokaErno]

I love it. Thank you. MORE, MORE, MORE! So far, Luxcore has been the best Blender render engine. It is much faster, than the old ones and beautiful. Only issue is that there are very few tutorials.

[@djtutorialscgi]

Thanks- I try. The YT algorithm is really killing me lately and my newer content isn’t really hitting very well. Let me know what specifically you might be needing and maybe it will inspire me to make something.

[@CsokaErno]

@@djtutorialscgi Thank you. I think, Luxcore is not a real popular renderer because Blender people think it is slow. Which is not true. Consequently there are just a very few tutorials and I haven't seen any from A to Z course. The few that exist are obsolete, old. So, you can fill up this parking lot with cars from any street :)

[@Daniel84740]

Luxcore caustics look beautiful

[@chj.schwarz]

That was great, very useful! Now I'm all set to get back into it.

[@MrTomyCJ]

I think we need more in depth info about the cache settings, since the documentation is kinda empty and it's hard to notice or figure out the optimal parameters for a given scene. The bidirectional engine is a whole other topic too, I found it indispensable for some volumetric caustic effects. After playing around with luxcore for a couple days I started to think it's worth it only for the caustics, and started looking for a way to "bake" them and add them to cycles renders just like you've done.

[@flonkplonk1649]

Only caustics ?! Indoor scenes for example look much better and more photorealistic in Luxcore compared to Cycles. Almost everything in Luxcore looks way better than in Cycles..

[@punmije]

@@flonkplonk1649​​⁠totally agree, luxcore is even faster and cleaner then cycles with proper photon GI cache settings. The big problem is great amount of noise everywhere. But I found the workaround that helped me to greatly reduce the noise. Instead of using log or power light strategy put everything to uniform sampling then manually tweak the light importance for the lights that produce noise give more importance. Use clamping but don’t trust the suggested value. Usually values from 5 to 50 will work for most of the setups. You would be amazed how much cleaner and detailed render is after these tweaks. For noise that comes from light tracing and caustics there is no help, you need to let it clean for some time since its brute force method from bidirectional light tracing that works only on cpu.

[@flonkplonk1649]

@@punmije thank you for your tipps! I always use Davinci Resolves Temporal Noise removal for animations.. don't like to render with too much samples

[@hanniaedithmartinezadame794]

Nice

[@malikgarcia699]

Ist there a way to do this on a Mbp m1? Or ist this just working for Windows?

[@djtutorialscgi]

I think there’s a Mac branch in the dev builds. You might need to check the forums.

[@malikgarcia699]

tried almost all of them nothing worked gave me an py error when i tried enabling it after installing; Is there any news or sources regarding arm builds for Luxcore Addon?@@djtutorialscgi

[@jostv.2726]

Everytime I try to render the scene I get the message 'Mesh' object has no attribute 'loop_triangle_polygons'. There is no information about this in the forums. Does someone know how to get this working? I installed a new version of blender (via Blender Launcher). My pc is completely new, so maybe there is some software that also needs to be installed? I had no problems when I used LuxCore a few months ago on my old pc :/

[@djtutorialscgi]

Default scene?

[@jostv.2726]

@@djtutorialscgi it is, yes. I then tried it with deleting all objects ansd adding new ones with luxcore material nodes

[@djtutorialscgi]

@@jostv.2726 hmm... AMD or Nvidia gpu?

[@jostv.2726]

@@djtutorialscgi My GPU is a Nvidia RTX 4070, the CPU is an AMD Ryzen 5 7600. 32 GB RAM. All Hardware drivers are upto date. Do you start Blenser over the Blender Launcher as well? Or do I maybe need to have Python installed? I also read about some "C++ Redistribution packages" some people mentioned. Oh man... XD

[@cr4723]

The Luxcore denoiser doesn't work that well. It is better to set the Render samples down to 512 and the noise threshold to 20, 64, 64 and then use the blender denoiser in compositing. The renderings then go quickly and cleanly.

[@djtutorialscgi]

It all depends on what you’re trying to do but generally I agree.

[@MrTomyCJ]

But that way you don't get the albedo and normal denoising data to give to the compositor denoiser, don't you? Is the denoising better even with that info lacking?

[@punmije]

@@MrTomyCJi think you can use render output, albedo pass and shading normal pass in luxcore, it’s essentially the same thing as denoising data in cycles, then use it with open image denoiser node in compositor

[@MEMES_0_0]

my pc became a f*ing airplane fan before i turned on gpu

[@vladartov2817]

In Blender 3.2 I get the message "Mesh object has no attribute "loop_triangle_polygons".

[@djtutorialscgi]

Hmm… is it when you go to render in viewport? When do you get this message? Also are you running GPU? If so, AMD or Nvidia GPU?

[@vladartov2817]

@@djtutorialscgi It starts already in the Material Preview shading mode, no matter what the render engine is, CPU or GPU. And the scene is not rendered as well. Have tried on 2 Workstations: Xeon and i7 with GeForce and Quadro respectively.

[@djtutorialscgi]

Interesting… if you jump on the discord perhaps me or another user can help more directly.

[@vladartov2817]

@@djtutorialscgi thanks, I'll do. I came to this video because I was looking for solution.

[@djtutorialscgi]

@vladartov2817 what you are running into sounds like a very technical issue. Either you’re missing a driver, not using compatible components or some other specific technical issue. Maybe we can help figure it out.

[@julianolisboa]

​Every time I put the viewport on the GPU, blender closes by itself.

[@djtutorialscgi]

Which version of Blender, LuxCore are you using and what GPU?

[@djtutorialscgi]

Also- are you trying it with a default scene or a scene with preset materials?

[@julianolisboa]

@@djtutorialscgi Blender 3.5, Luxcore 2.61e GPU Nvidia 3060 12gb

[@julianolisboa]

@@djtutorialscgi In Blender's default scene, I cube a light and camera works fine, if I open a scene made in Luxcore and switch from cpu to GPU in viewport render, it closes instantly.

[@djtutorialscgi]

@@julianolisboa that's odd... is denoising in the viewport turned on?