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Eric Arnebäck @erkaman2
, 16 tweets, 7 min read Read on Twitter
Alright! Below Im gonna post some good links, for people who are interested in volume rendering!
webdocs.cs.ualberta.ca/~pierreb/Visua…
Old course notes. In particular, see section 1.2.2, which explains the
important volume rendering integral.
patapom.com/topics/Revisio…
Course notes from @Patapom2 , with explanations on participating mediums,
scattering, phase functions, and ray marching
cemyuksel.com/research/deepo…
deep opacity maps. Nice technique for rendering self-shadows,
in volumetric mediums such as hair and smoke. you render
several layers of shadow maps, basically.
slideshare.net/DICEStudio/phy…
volumetric rendering, based on voxelization of the scene.
dgp.toronto.edu/people/stam/re…
Multiple scattering as a diffusion process.
amazon.com/Real-Time-Shad…
Read chapter 9 in this book.
amazon.com/Physically-Bas…
Read chapter 11 in PBR.
software.intel.com/sites/default/…
Adaptive Volumetric Shadow Maps
Practical implementation of light scattering effects using epipolar sampling and 1D min/max binary trees
software.intel.com/sites/default/…
speeding up raymarching with epipolar sampling.
Unity implementation of the above technique
github.com/robertcupisz/L…
Volumetric Light Scattering as a Post-Process
developer.nvidia.com/gpugems/GPUGem…
gpu gem, that describes full-screen method for rendering light shafts.
lebarba.com
nice webgl demo of volume rendering.
alright. if you folks got any more awesome links, you are free to post them here!😀😀😀
one more:
loopit.dk/rendering_insi…
about speeding up volumetric lighting, using blue noise. from @pixelmager
another one:
cdn2.unrealengine.com/Resources/file… …

shows nice technique for rendering godrays on even crappy mobile devices.
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More from @erkaman2 see all

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someone asked me a good question, so I will write down the reply as a twitter thread below :D
Question is something like: "Where do the BRDF formulas come from? How can we make our own?"
Answer:
I will mostly explain specular BRDFs, since they are most used.
the most common way of making them, is by approximating the material
surface as a bunch of small mirrors called microfacets.
for very rough materials, these microfacets will have normals pointing
in all kinds of directions(left image). For smooth materials, there is less normal variation(right image),
and very smooth materials will closely resemble a flat mirror surface.
Read 26 tweets
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Alright! below im gonna post my collection of links related to
occlusion culling. if I missed good links, you folks are welcome to
post them below.
"Practical, Dynamic Visibility for Games"
blog.selfshadow.com/publications/p…
occlusion culling by creating hiz-buffer from occluders.
also uses it for shadow caster culling. they find AABB of
objects for culling against hiz-buffer
"Secrets of CryENGINE 3 Graphics Technology"
slideshare.net/TiagoAlexSousa…
occlusion culling by reprojecting depth of previous frame, downscale with max operator.
to cull objects, rasterize bounding boxes of objects, and cull them
against downsaled depth buffer.
Read 16 tweets
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alright, below I'm gonna list some professors/researchers in Computer Graphics whose research and papers I absolutely love.

you folks are also very much welcome to post your own suggestions below!
Morgan McGuire(@CasualEffects)

Virtual Reality, Real-time Rendering, Transparency, Anti-aliasing
Shadows, Ambient Occlusion
casual-effects.com/#research
Keenan Crane(@keenanisalive)

Geometry Processing, Differential Geometry, Computational Design
cs.cmu.edu/~kmcrane/
Read 12 tweets

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So, I've waded through the Evangelical Alliance's new pastoral "guidelines" for interacting with trans people (ughh, the things I do to expose #transphobic #ciswits to the world), and let's just say it's time to tear this particular sh*t-bag a new hole.

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Read 176 tweets
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alright fam
sarah gave her approval with added description "it gives me a cucumber quest vibe"
so i'm gonna put on the first few eps of she-ra
I like the utter nonchalance in the way Catra greeted this alien witch saying "oh hey, Shadow Weaver" like most people would say "oh hey, Aunt Barb"
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Read 122 tweets
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Bent on growth, Zuck & Sandberg ignored warning signs about their platform being used by Russia and then sought to conceal them from public view.
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Read 112 tweets
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Alright, I'm gonna try that Twitter interactive vore story I've been throwing around! First post of the story coming in 10min. RTs on this post or on the first post of the story would be highly appreciated! #VoreThursday
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Alright, it's been a while, but let's do #IanLivetweetsHisResearch. Today we're reading Bob Altemeyer's The Authoritarians, which you can nab for free here: theauthoritarians.org/Downloads/TheA…
It's a whole-ass book so I'm just gonna share the things that jump out at me from what I've read so far and what I read this morning. Might come back to it in future livetweets.
Also shoutout to whichever follower recommended the book to me, You are lost in a sea of old notifications but it was a good recommendation!
Read 177 tweets

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