And here's an unsharp masking (sharpening) filter implemented using the gaussian blur!

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A two-pass Guassian blur post-processing shader in UE4.

Hue shifting for still objects relative to the camera. If a pixel does not change in color for some time, the hue of that pixel is offset.

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Using the same accumulation buffer, it is possible to simulate increased sensitivity to negative afterimages. This is one such attempt and may still require some tuning. I am wondering whether it'd be possible to combine both effects.

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Made the effect respect the framerate, added a parameter for the effect's opacity. This is what it looks like on 50%, this time without VR headset shakiness.

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A proof of concept of a custom post-processing temporal shader in UE4, for VR. It blends the current and the previous frame.

Matt Keeter's paper on Massively Parallel Rendering of
Complex Closed-Form Implicit Surfaces is a very interesting read with an extremely satisfying implementation. It takes a simple concept of surfaces defined by `f(x, y, z) = 0` and invents a novel rendering technique for them, on the GPU.

If you are interested in alternatives to centralized social networks like Facebook and Twitter, check out the latest episode of the Small Tech Foundation podcast about social networks with Paul Frazee, cofounder of CTZN, hosted by @aral and @laura:

The pasta I love is out of stock. @BDClownFarm

Here's a preview of what I've been working on over the past several months. Still nowhere near finished, but we're getting there. It is (going to be) a real-time graph-based video compositor for broadcasting and creative coding. What you can see in the preview is the UI rendering of basic nodes and graph validation errors highlighted in red, with some debug information below.

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Onion service URLS are not easy for humans to remember, which makes it hard for users to discover or return to an onion site. In this release, we're bringing you a proof-of-concept for human-memorable names for SecureDrop
, developed with Freedom of Press
& HTTPSEverywhere.

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This is probably the first time when I looked up a public figure and instead of finding a Twitter profile, I found a Mastodon profile: @aral

This account is not dead.
View transformations working.
Naive triangle-ray intersector implementation included.

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Cache-Poisoned Denial-of-Service (CPDoS) is a new class of web cache poisoning attacks aimed at disabling web resources and websites.

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My most recent open source project:

Prevent short link services from tracking you and remove tracking parameters from the underlying urls.

You can 100% host it yourself and its #GPLv3

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Bit451 is an open source decentralized / distributed anonymous p2p media network. It has been characterized as “YouTube meets BitTorrent meets Bitcoin”.
#decentralization #anonymity #p2p

ColdFusion made a great video explaining the roots of the opioid epidemic in the US.

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Mastodon for Tech Folks

This Mastodon instance is for people interested in technology. Discussions aren't limited to technology, because tech folks shouldn't be limited to technology either!