Woojong Koh

I Wish You Grief

Thu, 16 Apr 2026 00:00:00 +0000

Life reveals its most beautiful elements only against the dark backdrop of our deepest losses.

The Retro Game Masterpiece Collection

Thu, 02 Apr 2026 00:00:00 +0000

A Zero-Hoarding Guide to Retro Gaming

[번역] "Collaboration" is bullshit

Wed, 25 Mar 2026 00:00:00 +0000

왜 협업이라는 이름 아래 책임감이 사라지고 일은 진행되지 않는가?

[번역] One process programming notes (with Go and SQLite)

Mon, 16 Mar 2026 00:00:00 +0900

Go와 SQLite를 활용한 1인 개발자의 단일 프로세스 아키텍처 구축기

[번역] The Grug Brained Developer

Mon, 10 Nov 2025 00:00:00 +0000

자각 있는 작은 뇌처럼 생각하기 위한 평신도 안내서

[테크체인저] 임신·육아 시장도 AI로...휴먼스케이프와 협업하는 구글 출신 고우종 대표

Wed, 13 Nov 2024 14:50:43 +0900

Summary In this interview with Bloter, I discuss Cowork AI’s collaboration with Humanscape to integrate generative AI into Momitalk, a leading pregnancy and childcare mobile app. We explore the massive potential of solving unmet needs in the global pregnancy and childcare lifecycle using AI, starting with our BabyMagic service which predicts a baby’s appearance from ultrasound images.

Links

Key Excerpts #

On the Unmet Needs in the Pregnancy Lifecycle:

구글 웨이모 엔지니어가 Hashed에 간 이유

Fri, 06 May 2022 12:00:00 +0900

Summary In this interview with XREAL, I share the reasoning behind my transition from Waymo to joining the crypto VC Hashed as an Entrepreneur in Residence (EIR). I talk about my framework for making career decisions—looking for technologies with 10x to 100x growth potential—and why I believe Web3 and crypto represent the next major inflection point for innovation.

Links

Archived Article (Wayback Machine)

Key Excerpts #

On Career Choices and Future Value:

박사 학위·구글 모두 버리고…30대 청년의 '과감한 선택'

Mon, 04 Oct 2021 07:35:00 +0900

Summary This post combines two related interviews published by The Korea Economic Daily (Hankyung) detailing my decision to leave Waymo and prepare for a new startup venture. We discussed the future of autonomous driving, the technical differences between Waymo’s LiDAR-centric approach and Tesla’s camera-centric approach, and the societal shifts—like demographic changes and climate change—that I believe will create the next big markets.

Links & Resources

Key Excerpts #

On Leaving Waymo:

테슬라와 차원이 다른 자율주행 능력? 웨이모 초기멤버가 알려드림

Sun, 08 Aug 2021 12:00:00 +0900

Summary I appeared on the “내일은 투자왕 - 김단테” (Kim Dante) YouTube channel to discuss my time at Waymo, the realities of autonomous driving technology, and how Waymo’s approach compares to Tesla’s. We also touched upon the future of self-driving trucks and my reasons for leaving to start a new venture.

Links

Video Interview #

Chapters & Timeline #

Here are the key topics discussed in the video, with dual Korean and English titles:

View-Dependent Adaptive Cloth Simulation with Buckling Compensation

Thu, 01 Oct 2015 00:00:00 +0000

Published in IEEE Transactions on Visualization and Computer Graphics (TVCG), October 2015.
Authors: Woojong Koh, Rahul Narain, and James F. O’Brien.

Abstract #

This paper presents a novel method for view-dependent cloth simulation using dynamically adaptive mesh refinement and coarsening.

Simulating highly detailed cloth is computationally expensive. However, much of that detail is often imperceptible to the viewer depending on the camera’s position. Given a prescribed camera motion, our method adjusts the criteria controlling the mesh refinement to account for both visibility and apparent size within the camera’s view frustum.

Implementing Real-Time Shadow and Environment Mapping

Mon, 01 Apr 2013 00:00:00 +0000

As part of my computer graphics coursework, I built an engine to explore two fundamental rasterization techniques used to dramatically improve the realism of 3D scenes: Shadow Mapping and Environment Mapping.

While rasterization is incredibly fast, it doesn’t naturally handle global light interactions like shadows or reflections. These mapping techniques act as clever workarounds to simulate these physical properties in real-time rendering environments.

Demonstration #

The video below demonstrates the engine running in real-time. It showcases dynamic shadow casting as the light source moves across the scene, and environment mapping on complex geometric models (the Stanford Armadillo and a Heptoroid).

Building a Monte Carlo Path Tracer

Fri, 01 Mar 2013 00:00:00 +0000

As part of my coursework in computer graphics in 2013, I implemented a custom Monte Carlo path tracer. Path tracing is a fundamental rendering algorithm that simulates the physical behavior of light to create highly realistic images, calculating global illumination by tracing rays of light as they bounce around a 3D scene.

Rendered Results #

Below are two sample scenes rendered using the engine. The first demonstrates soft shadows, diffuse reflection, and color bleeding in a classic Cornell Box environment. The second showcases a reflective cone with complex light interactions and specular highlights.

Archive: 2011/2012 SNU Engineering Top Graduates

Fri, 24 Feb 2012 12:00:00 +0000

SNU College of Engineering Alumni Association Top Graduate Awards Ceremony #

On Friday, February 24th, the 2011 Top Graduate Awards Ceremony was held at the Seoul National University Engineer House. The ceremony was attended by Alumni Association President 윤우석, Executive Vice President 최상오, Dean of Engineering 이우일, the associate deans, department heads, and the honored graduates.

Following welcoming remarks by Alumni Association President 윤우석 and an encouraging address by Dean 이우일, certificates of commendation and prizes were awarded to a total of 31 Top Graduates from each department/school. A valedictory speech was given by 박영우 from the School of Electrical Engineering on behalf of the top graduates.