Mesh to volume texture technique!

[@importon]

very cool! can you show us how to use this baked volume texture with heterogeneous volume?

[@Tylru]

It might just be my own incompetence, but it seems the blueprints from Patreon no longer work in 5.2.1 At least, the RT doesn't output anything at the moment.

[@ghislaingirardot]

Roger that, I'll check it out asap

[@ghislaingirardot]

Seems like I do have the same issue in 5.2.1. Will investigate what's going on asap. Sorry for the inconvenience. I think it's best to move away from the procedural mesh component and rely on geometry scripting now, so I might just upgrade the project to it

[@Tylru]

@@ghislaingirardot No problem at all! Thank you for checking it out so quickly. I'm glad it wasn't just me being unable to get it to work 😅

[@ghislaingirardot]

@@Tylru Hey! I pushed an update on Patreon. I upgraded the project to Geo Scripting in the end. Lemme know if you find any bugs!

[@Tylru]

@@ghislaingirardot Amazing, thank you Ghislain! You're a star :) When I get time to check this out again I'll let you know how it goes :)

[@刘敏-y9r]

Hello, how can this volumetric cloud material be generated without using the volumetric fog component?

[@ghislaingirardot]

Hi! This is not a 'cloud' material, just a basic raymarching algorithm to step through the volume texture and build up a 'density' value (which is essentially what a cloud shader does, but in a more intricate way)

[@ImaginaryBlend]

How do you find time to make so many videos and new experiments? Do you even sleep sometimes? btw: It would be simpler and cheaper to use world position offset for rendering tiles instead masking. :)

[@ghislaingirardot]

I do sleep, but I do work a lot as well :P Hmm not sure what you mean exactly with world position offset but yeah I guess :D? There's always many ways to do things. I actually didn't care about performance here tbh because it's an offline tool so usually performance isn't much a concern unless it's insanely expensive and takes seconds to compute :)

[@ImaginaryBlend]

​@@ghislaingirardot I mean all those nodes in M_RT_GhisMeshToVol_Slices (3:07) can be replaced by 6 nodes with using WPO and sampling at the default tex-coord location. You only have to calculate the location/scale of quad and offset verticles. You are right, in this case, performance does not matter but it is just good practice, additionally clean and easy to debug/understand, I thought that it's worth noticing maybe next time you will consider this way :) Keep doing good work!

[@ghislaingirardot]

@@ImaginaryBlend Right, but I'm not rendering vertices in this material though, it's a rendered image of the cap mesh that's composited into an atlas texture using a simple DrawMaterialToRenderTarget node. So I fail to see how the WPO is involved here. I'm probably missing something :D I guess you could make the scene capture component render the sliced cap from below at the atlas dimension directly and move the sliced mesh using WPO tile by tile and skip my material setup. You could also probably use Shared:Clamp on the texture sampler and just shift the UV coordinates to have that captured image show just one time on the required tile... And a million other ways :D Anyway... I'm probably too brain dead right now to understand what you mean but I'll assume you're right :D Thanks for the feedback, always appreciated :)

[@plasid2]

Make some fluid stuff pls

[@ghislaingirardot]

Not on my plans, no. There's plenty of great ressources out there to get you started with fluid sim though: kzbin.info/www/bejne/n3ykh4WdfteIhbc

[@plasid2]

@@ghislaingirardot ;(

[@rtea_academy]

The main problema is the ilumination with raymarching. Because in fact everything is a fake. I consider more interesting that you explain how can you iluminarse this pseudo volumetric assets, since to do even with blender you can prepare with fragments of slices frame camera shoots, without use Houdini. Resume this one, explain us like you can light this pseudovol. Thanks.

[@ghislaingirardot]

Oops I forgot to include Ryan Brucks' blog in the video description. Ray marching, and Volumetric lighting overall, is all explained in one of his blog post, including HLSL code. Have fun :)

[@rtea_academy]

​@@ghislaingirardot I know Ryan. Iam asking you if you can explain us this great solutions. Thanks you any way Guy!!!