CGI tech news box

General project and community related discussions and offtopic threads.
kintuX
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Re: CGI tech news box

Post by kintuX » Wed Jan 22, 2020 2:10 pm

lacilaci wrote:
Wed Jan 22, 2020 12:08 pm
So.. How is this blood magic working?
https://www.youtube.com/watch?v=M1nuviu ... mv02U-YR8o
:idea: DECALMachine w/ Shrink wrap modifier.

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lacilaci
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Re: CGI tech news box

Post by lacilaci » Wed Jan 22, 2020 2:16 pm

kintuX wrote:
Wed Jan 22, 2020 2:10 pm
lacilaci wrote:
Wed Jan 22, 2020 12:08 pm
So.. How is this blood magic working?
https://www.youtube.com/watch?v=M1nuviu ... mv02U-YR8o
:idea: DECALMachine w/ Shrink wrap modifier.
that's way too much effort compared to a texture vs texture. He is turning bitmap into paralax map with near the same quality as displacement at near the same computational cost of bump mapping...

kintuX
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Re: CGI tech news box

Post by kintuX » Wed Jan 22, 2020 2:21 pm

lacilaci wrote:
Wed Jan 22, 2020 2:16 pm
kintuX wrote:
Wed Jan 22, 2020 2:10 pm
lacilaci wrote:
Wed Jan 22, 2020 12:08 pm
So.. How is this blood magic working?
https://www.youtube.com/watch?v=M1nuviu ... mv02U-YR8o
:idea: DECALMachine w/ Shrink wrap modifier.
that's way too much effort compared to a texture vs texture. He is turning bitmap into paralax map with near the same quality as displacement at near the same computational cost of bump mapping...
Have you used any - either Max+Fstorm or DECALmachine?
I did, wasn't impressed... and since, haven't find the use for it or a client wanting it yet.

Oh, & BTW one simply pulls the specific decal from the library, applies modifier and animates the move.

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lacilaci
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Re: CGI tech news box

Post by lacilaci » Wed Jan 22, 2020 2:29 pm

kintuX wrote:
Wed Jan 22, 2020 2:21 pm
lacilaci wrote:
Wed Jan 22, 2020 2:16 pm
kintuX wrote:
Wed Jan 22, 2020 2:10 pm


:idea: DECALMachine w/ Shrink wrap modifier.
that's way too much effort compared to a texture vs texture. He is turning bitmap into paralax map with near the same quality as displacement at near the same computational cost of bump mapping...
Have you used any - either Max+Fstorm or DECALmachine?
I did, wasn't impressed... and since, haven't find the use for it or a client wanting it yet.

Oh, & BTW one simply pulls the specific decal from the library, applies modifier and animates the move.
Did you see any comparison between the bump and the new paralax bump in fstorm? You telling me this is not impressive?

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Dade
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Re: CGI tech news box

Post by Dade » Wed Jan 22, 2020 2:46 pm

lacilaci wrote:
Wed Jan 22, 2020 2:29 pm
Did you see any comparison between the bump and the new paralax bump in fstorm? You telling me this is not impressive?
It is a fake and, like all fake techniques, it has draw backs (for instance the lack of shadows, it may have serious problems if seen trough mirrors and glasses, etc.). At the end of the day is always a trade-off: it may be good to have but you have to renounce to something.
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kintuX
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Re: CGI tech news box

Post by kintuX » Sun Jan 26, 2020 7:29 pm

lacilaci wrote:
Wed Jan 22, 2020 2:29 pm
Did you see any comparison between the bump and the new paralax bump in fstorm? You telling me this is not impressive?
Oh yeah, didn't even noticed it :lol: Corona has it like 2.5 dimensional displacement to save memory... and it saves quite a lot when you got detailed rocky & stoned architectural scene (is mighty helpful, as we tend to exaggerate with the luxurious matter)

juangea
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Re: CGI tech news box

Post by juangea » Fri Feb 07, 2020 5:15 pm

Here is the new 2019 Blue Noise Temporal Dithering paper, it's pretyt interesting :)

Slides:
https://hal.archives-ouvertes.fr/hal-02 ... slides.pdf

Paper:
https://hal.archives-ouvertes.fr/hal-02158423/document

kintuX
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Re: CGI tech news box

Post by kintuX » Tue Feb 18, 2020 10:17 pm

Rendering transparent materials with a complex refractive index: semi-conductor and conductor thin layers

Abstract :
During physical simulation of light transport, we separate materials between conductors and dielectrics. The for-mer have a complex refractive index and are treated as opaque, the latter a real one and are treated as transparent.However, thin layers with a complex refractive index can become transparent if their thickness is small compared to the extinction coefficient. This happens with thin metallic layers, but also with many pigments that are semi-conductors: their extinction coefficient (the imaginary part of their refractive index) is close to zero for part of the visible spectrum. Spectral effects inside these thin layers (attenuation and interference) result in dramatic color changes.
Paper: https://hal.inria.fr/hal-02191534/document

Source: https://hal.inria.fr/hal-02191534

Examples:

Interference
Image

Cadmium Sulfide
Image

Gold & Copper
Image

Hematite
Image

;)

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Sharlybg
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Re: CGI tech news box

Post by Sharlybg » Tue Feb 25, 2020 4:37 pm

Bidirectional rendering on Steroids

https://cs.dartmouth.edu/~wjarosz/publi ... 4upbp.html

Image

A single algo to render them all at great speed : UPBP

Youtube Video explaining it : (wait til the end)

https://www.youtube.com/watch?v=TbWQ4lMnLNw
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jgrover110
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Re: CGI tech news box

Post by jgrover110 » Tue Feb 25, 2020 5:14 pm

RIP Jaroslav Křivánek

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