Underwater Scenes in Blender | Part Two: Materials, Composition, Volumetrics, Caustics and Lighting

This is part 2 to a series on creating underwater scenes in Blender using the LuxCore engine. This video covers the composition, materials, lighting, volumetrics, caustics and lighting in the scene. The next video will cover the finalization of the render and some small amounts of compositing.
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[@djtutorialscgi]

Project Download here: djtutorials.gumroad.com/l/zfklpe

[@yvesjannic6695]

Hello sir, now there is 3.2 version is it possible to have caustics effects without using luxcore, my computer is a weak one or at least something similar ? Great série bye thé way thanks

[@djtutorialscgi]

It doesn’t work the same way unfortunately. 3.2 only has shadow caustics. It doesn’t support multi-refraction light tracing.

[@insertnamehere6968]

hello, don't know if you will see this, but I was wondering without using the Luxcore engine if creating a basic underwater scene, remove the godrays and ruins is possible, thanks.

[@djtutorialscgi]

It’s possible but difficult in the Cycles engine. Other engines, yes.

[@metadr0n13]

Does this work using cycles?

[@djtutorialscgi]

No. You have to use LuxCore for this series. It’s probably possible to fake the reflected light caustics in Cycles.

[@DeBeau]

Dunno what I'm doing wrong, but when trying to 'activate' the LuxCore Render Engine in the Add-ons settings I get the Error message: ValueError: registered_class(...): already registered as a subclass 'LuxCoreRenderEngine' Just wondering if anybody else is having this issue? - Currently using Blender v.4.0.1. - Though the LuxCore Render Engine Plugin cannot be 'activated' it still shows as available in the drop-down menu for Render Options, except none of the functions tied to the LuxCore Engine is available anywhere in the Properties UI.

[@djtutorialscgi]

I’m not sure if the latest released build works with Blender 4.0. Did you grab a development build of LuxCore or the official release version?

[@DeBeau]

@@djtutorialscgi I used the 'Official Release', compatible with v.3.0+ of Blender. It was the latest I could find. I've just tried to install the same version of the Add-on on Blender v.3.5 without any apparent issues. Maybe development and update of the Add-on is either halted or ceased all together. Guess I'll have to do a bit of 'research' on this topic. 'Preciate you taking the time to reply, though this tutorial may be slightly 'dated'.

[@djtutorialscgi]

@DeBeau it may be dated but generally speaking with LuxCore, you need to get the development builds or use a version of Blender that is compatible. LuxCore has a small dev group and they try and keep up with Blender, but often addon devs are behind the newest versions of the base applications.

[@DeBeau]

@@djtutorialscgi I know indie developers have quite a task keeping up with bigger and more established teams. And I'll happily use an older version of Blender if that means I'll be able to make use of the add-on. I'm just glad to know I'll still be able to use it. In fact, if not for tutorials like this one, showing what can be achieved with a bit of perseverance, lazy guys like myself would have a hard time maintaining our motivation. So... Though it may not come across that way, I'm actually quite grateful that people with your level of skills are willing to share the tutorials on this platform. Thanks, really.

[@jamesrobertson2712]

Great tutorial ! Everything looks extremely good in the viewport, but for some reason, the godrays do not render at all...

[@djtutorialscgi]

Hmm…. In the viewport or when you go to render?

[@jamesrobertson2712]

@@djtutorialscgi Hello ! I managed to get the caustics to render in the meantime (it takes forever though), I think the object I used was too small. 6 hours and countng to render a single image... Either way it looks spectacular !

[@djtutorialscgi]

@@jamesrobertson2712 my next video is on rendering. You could possibly save time by using a denoise setting or value clamp.

[@Doomsday499]

I followed all of the exact steps you did, and it just didn't work, the light just wasn't refracted at all underwater...

[@djtutorialscgi]

Please go onto the Discord server and post your project in the LuxCore chat

[@mohammadalanzi9720]

Go to icosphere and deselect shadow from (Rey visibility)

[@D3LB0Y]

a gobo would've been easier and faster

[@djtutorialscgi]

Gobo?

[@D3LB0Y]

@@djtutorialscgi gobo lighting...quick and easy shadows