LuxCoreRender Forums

TAO wrote: Tue Jul 06, 2021 6:59 am The only issue I faced right now is the volume in LuxCore is not as solid as Arnold volume and the render time is different.

Increase/decrease the scattering to make the volume more/less "solid".

Is it this technique?
https://docs.arnoldrenderer.com/display ... +to+Volume

B.Y.O.B. wrote: Tue Jul 06, 2021 10:17 pm Is it this technique?
https://docs.arnoldrenderer.com/display ... +to+Volume

yes, Polymesh to Volume + Volume Displacement that's the technique I used.

Actually, I could implement it, as a two steps:

1) convert an arbitrary mesh in a NULL cube with inside a volume (having the shape of the mesh);
2) operations between volumes (sum, subtraction, etc.);

It may be not even hard to do but it sounds a bit like a toy with very little practical applications: not sure if it is worth doing.

Dade wrote: Tue Jul 06, 2021 10:44 pm Actually, I could implement it, as a two steps:

1) convert an arbitrary mesh in a NULL cube with inside a volume (having the shape of the mesh);
2) operations between volumes (sum, subtraction, etc.);

It may be not even hard to do but it sounds a bit like a toy with very little practical applications: not sure if it is worth doing.

Those are exactly the steps to create this effect.

i achieve a very similar effect using a displacement on base material like matte and the apply volumetric shader after that as you suggest in the first post, not exactly the same, and render time is getting too long especially when I use a higher value for scattering, but it does the job.
Now I create a single volumetric material that has a displacement option using this trick. all math operations happen on displacement of the base material.
users will see just a single volume material they need.
Of course, having a dedicated volume shader can work better.

TAO wrote: Wed Jul 07, 2021 7:09 am render time is getting too long especially when I use a higher value for scattering, but it does the job.

Are you using multi-scattering or heterogeneous volumes ? Homogeneous volumes are pretty fast to render.

Dade wrote: Wed Jul 07, 2021 8:42 am

TAO wrote: Wed Jul 07, 2021 7:09 am render time is getting too long especially when I use a higher value for scattering, but it does the job.

Are you using multi-scattering or heterogeneous volumes ? Homogeneous volumes are pretty fast to render.

Oh, I see, so I need to use heterogeneous volumes instead. thank you.
If B.O.B.Y has time to add this type of effect in the blender I can provide a tutorial of how to make it and that could be interesting to Blender users. it is not necessarily a new shader just a combination of the existing shader can do the trick.
of course, a dedicated shader can be more useful and accurate but to get fast results the mentioned method can be handy to create a shader for Volumetric mesh that supports displacement.

TAO wrote: Wed Jul 07, 2021 10:23 am

Dade wrote: Wed Jul 07, 2021 8:42 am

TAO wrote: Wed Jul 07, 2021 7:09 am render time is getting too long especially when I use a higher value for scattering, but it does the job.

Are you using multi-scattering or heterogeneous volumes ? Homogeneous volumes are pretty fast to render.

Oh, I see, so I need to use heterogeneous volumes instead. thank you.

You mean homogenous

Dade wrote: Wed Jul 07, 2021 1:53 pm

TAO wrote: Wed Jul 07, 2021 10:23 am

Dade wrote: Wed Jul 07, 2021 8:42 am

Are you using multi-scattering or heterogeneous volumes ? Homogeneous volumes are pretty fast to render.

Oh, I see, so I need to use heterogeneous volumes instead. thank you.

You mean homogenous

Yes homogenous.

TAO wrote: Thu Jul 01, 2021 11:46 pm In the past few days, I was working on my new project to achieve a new look in organic render, and the results are very satisfying. is it possible to achieve this type of render with the LuxCore too?

I think, yes, u can achive same kind of result with LuxCore, all u need is basics knowledge of math, imagination and time for rendering volumes.