Hi, What settings to use to see a laser beam clearly and sharply through a volume?
I already tried different Scattering Scale Values between 0.1 to 1 but it ends up either too faint to see or too blurred out.
Scattering Scale 0.1
Scattering Scale 1
my setup
Laser and Volume Scatter
Forum rules
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Laser and Volume Scatter
- Attachments
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- laser beam thru glass.blend
- (1.13 MiB) Downloaded 128 times
Re: Laser and Volume Scatter
1) Why did u use Glass Material? If u are looking for only volume affects laser - just put Null (Transparent) instead of Glass.
2) Homogen absorb colour shouldn't being black(at least completely black)
3) Laser source should be really small - now u have size of 30cm. Put some lower values (0.002 for example)
4) Increase performance for laser in lamp settings tab.
5) If using BiDir pathtracing - set Sampler from Sobol to Metropolis
2) Homogen absorb colour shouldn't being black(at least completely black)
3) Laser source should be really small - now u have size of 30cm. Put some lower values (0.002 for example)
4) Increase performance for laser in lamp settings tab.
5) If using BiDir pathtracing - set Sampler from Sobol to Metropolis
Last edited by DionXein on Thu Apr 01, 2021 9:49 am, edited 1 time in total.
Re: Laser and Volume Scatter
This:
1) set cube material to "null" (not glass);
2) multiply laser light source power by 10;
3) set volume absorption to 0;
4) divide volume scattering by 10
and the result is:
1) set cube material to "null" (not glass);
2) multiply laser light source power by 10;
3) set volume absorption to 0;
4) divide volume scattering by 10
and the result is:
Re: Laser and Volume Scatter
Thank you guys. I got it working but is there a way to simulate also refraction and partial internal reflection?
With Null Object refraction also doesn't seem to work.
With Null Object refraction also doesn't seem to work.
Re: Laser and Volume Scatter
Refraction is a feature only of glass material (i.e. volume IOR is used only when going trough a glass surface). NULL is just a passthrough material.
Re: Laser and Volume Scatter
What Material to use if the object is liquid?
Also why is Volume Scattering behaving erratically with Glass Materials which is per se transparent?
Re: Laser and Volume Scatter
Glass.
It doesn't It works like a glass with refraction and (internal) reflection. Null material should be like a glass with IOR 1.0, 0.0 reflection and 1.0 transmission.
P.S. there is also some other factor related to what a BiDir or Path can or can not render but that should be your problem.
Re: Laser and Volume Scatter
Thanks Dade. I got the laser beam refraction and reflection through glass almost working now by hiding the Glass Object from Camera. There's still something strange however and I cannot get the beam to come out visible from the glass cube beneath. That means no more light scattering after coming out and returns only after hitting and bouncing back on a Matte Plane Object???
Laser Beam Spot Beam
- Attachments
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- spot beam thru glass.blend
- (1.13 MiB) Downloaded 127 times
Re: Laser and Volume Scatter
Thanks again! Got it fully working now. It needed another External Volume Shader Node for the Plane Object beneath the Glass Cube Object.