Search found 256 matches

by wasd
Fri Jan 10, 2020 12:25 pm
Forum: General Discussion
Topic: Horizon
Replies: 0
Views: 81

Horizon

When modeling landscapes, be aware of curvature of the Earth. With perfectly flat ground surface, at 9.26 km from observer surface will be 6.7 meters below * tangent line drawn at observers location! That makes great difference from flat ground. You can easily see that on pictures below: 1.png 2.png...
by wasd
Mon Dec 30, 2019 2:50 pm
Forum: User Support
Topic: Doing proper SSS
Replies: 6
Views: 357

Re: Doing proper SSS

I used matte translucent for this test. Does this look correct? Nope, it doesn't. I am just trying the same – make at least moderately correct looking human skin, but it seems current materials with volumes attached just don't make any sense. If they are physically based, I want to know on what phy...
by wasd
Fri Dec 13, 2019 10:01 pm
Forum: User Support
Topic: Volume IOR
Replies: 8
Views: 299

Re: Volume IOR

Dade wrote:
Fri Dec 13, 2019 9:07 pm
It is a node working on surfaces (like LuxCore glass, roughglass, etc.), not volumes so it is not applicable to your problem.
That's right. I just thought it might be good enough substitution for things like convections flows.
by wasd
Fri Dec 13, 2019 7:55 pm
Forum: User Support
Topic: Volume IOR
Replies: 8
Views: 299

Re: Volume IOR

Is there the way to simulate hot air for example? IOR is constant over all the volume so it is not possible to simulate hot air for desert-like optical illusions; they are the result of different air temperature => different density => different refraction. It would require to write same ad hoc cod...
by wasd
Fri Dec 13, 2019 5:07 pm
Forum: User Support
Topic: Volume IOR
Replies: 8
Views: 299

Re: Volume IOR

Dade wrote:
Fri Dec 13, 2019 5:01 pm
wasd wrote:
Fri Dec 13, 2019 4:52 pm
We can't really have any IOR on volumes, right? It's only surface which can have IOR?
All volumes have IORs however it is used (i.e. there is refraction) only when the surface between them is glass.
Is there the way to simulate hot air for example?
by wasd
Fri Dec 13, 2019 4:52 pm
Forum: User Support
Topic: Volume IOR
Replies: 8
Views: 299

Volume IOR

We can't really have any IOR on volumes, right? It's only surface which can have IOR?
by wasd
Fri Oct 25, 2019 2:49 am
Forum: User Support
Topic: Air Dust
Replies: 16
Views: 993

Re: Air Dust

If you want to limit the extent of the fog, you can use a fog box, but you have to set the camera volume to "fog" (if the camera is inside the box) so the rays start in the correct volume. Setting camera volume never worked right if you have at least 3 volumes in your scene. https://github.com/LuxC...
by wasd
Thu Oct 24, 2019 9:48 am
Forum: User Support
Topic: Air Dust
Replies: 16
Views: 993

Re: Air Dust

Just why it doesn't work if the "Cube" volume object totally surround the camera ? Because it never worked that way. Camera volume will work for you if you have no more than one volume in you scene. Also the idea of "external volume" seems a bit funny to me. Because if I have a dusty room with a ta...
by wasd
Thu Oct 24, 2019 9:34 am
Forum: User Support
Topic: Air Dust
Replies: 16
Views: 993

Re: Air Dust

Probably interior and exterior volume are not defined for objects. Attached fixed blend conf Thanks you for the help. So everything have to be correctly setup manually like you did.I can understand the logic behind. So now why my initial method is working ? i don't know :roll: What is the limitatio...
by wasd
Sat Oct 19, 2019 9:25 pm
Forum: User Support
Topic: Material Pointer behavior in LuxBlend 2.2
Replies: 10
Views: 825

Re: Material Pointer behavior in LuxBlend 2.2

I can reproduce it. However, I'm not sure if it's worth fixing this. This is a use case that never makes sense as far as I can see, or am I wrong? Black hole in place of material makes even less sence. What is its purpose? Is there any reason for this? If not I think that should be fixed. It's coun...