Olivier Therrien

R&D Graphics Programmer at CDRIN

[Olivier Therrien @volfaze]

@SoftEngineer Also @Mirko_Salm released an improved algorithm that is more physically accurate: https://t.co/tkiBpcXw7p

[Olivier Therrien @volfaze]

@SoftEngineer We published a paper to fix exactly the problems that you mention at the end of the writeup: https://t.co/xNPCw6dwjw

Here are a few implementations:
https://t.co/r6akZR9S8x
https://t.co/U8jwDB5DOB

[Mr F @guycalledfrank]

Meanwhile Suslik (Alexander Sannikov) is improving Radiance Cascades for the general 3D case: https://t.co/TSesnJFyYQ

[AMD GPUOpen @GPUOpen]

Capsaicin is not just for tacos, it's also our developer rendering framework!

v1.3 is out now:

🌶️ Added heat with GI-1.2, which includes multiple-bounce indirect lighting.
🌶️ HDR support with spicier tone mapping.

And much, much more: https://t.co/yUmggcZGb2

[Florisium @florisium]

A bit technical thread 🧵

I’ve been improving the in-game ambient occlusion system - and ended up with something I call:
Blob-based Analytical Ambient Occlusion on Primitives

Here’s what it does to the final image:
(more examples later in the thread)

(1/16)

[Three.js @threejs]

SSGINode: New node for screen-space global illumination
https://t.co/twZlfJBGQX

[Mirko @Mirko_Salm]

Distant light sampling for GT-VBAO with different quality options: https://t.co/74Bx1EtJGB (+ the math: https://t.co/yEoUVh0WiQ)

[Mike Turitzin @miketuritzin]

Nice li'l new video covering (some of) the history of SSAO algorithms:

https://t.co/ZPwm9IWP5R

[Olivier Therrien @volfaze]

@AlanPereiraArt @bjornornorn @Mirko_Salm There is also a blog post and slides: https://t.co/LBu5atBa0l

[Olivier Therrien @volfaze]

@AlanPereiraArt @bjornornorn @Mirko_Salm Paper is here: https://t.co/LTZzfqvzSA

[Björn Ottosson - making Island Architect @bjornornorn]

I'm working on a AO and GI for my game. For that reason I'm extending @Mirko_Salm's GT-VBAO (based on @volfaze's work). I've done two things so far:
- Sampling a distant light instead of computing AO
- Added a heuristic for estimating occluder thickness

Details and links below

[Olivier Therrien @volfaze]

@Mirko_Salm Nice! For the cosine weighted version, if you do a dot product with the tangent (of projected normal) instead of view, I think samples would already be in cosine space and won't require acos

[Olivier Therrien @volfaze]

@NickChapmn @Mirko_Salm has worked on a more physically correct version of the algorithm, maybe he has some thoughts on this.

[Olivier Therrien @volfaze]

@NickChapmn (3/3) Maybe a more accurate way to do this would be to reweight the final contribution so it adds up to 1 (untested). Just removing the term and assuming the sample covers the entire sector is certainly more correct.

[Mirko @Mirko_Salm]

GT-VBGI: Ground Truth Visibility Bitmask Global Illumination: https://t.co/2u2cHNo2ij. image: GT-VBGI (left) vs. Reference (right). 2. image: the same as the 1., but converged. GT-VBGI matches the results of a brute force ray-marcher.

[SubstrataVR @SubstrataVr]

Got screen-space global illumination working! (still pretty hacked up)

[Olivier Therrien @volfaze]

@Mirko_Salm Nice! Is there more noise with the unidirectional GT-VBAO?

[Three.js @threejs]

The quest for the best SSAO continues!💪

SSRT3
https://t.co/YDFbJ5cHbQ

GTVBAO
https://t.co/4WYLIfc3tQ

https://t.co/vt5xH5ME13