Harry Alisavakis
Technical artist known for approachable shader and VFX tutorials on his blog and the Technically Art newsletter, focused on making games look good with code. Was a technical artist at Jumpship (Somerville) as of 2022.
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- @halisavakis.com: setting a vertex UV to (0,0) gives free growth rings
Procedural branch end caps got automatic tree growth rings from a placeholder UV coordinate on the middle vertex.
bsky.app · Mar 2026 - Jack Gutmann interviews Harry Alisavakis on shaders and tech art
Long conversation about shader work, tech art practice and breaking into the industry.
youtu.be · Dec 2025 - @halisavakis.com: HLSL function declared in one file, defined in another
Shader tip: split declaration and definition across include files so passes share code while implementations vary.
bsky.app · Sep 2025 - Tricubic sampling gist for smoother low-res volumetric light shafts
Felix Westin's tricubic texture sampling snippet, used to reduce low-resolution artifacts in intense light shafts.
gist.github.com · Jun 2025 - @halisavakis.com: fake multiple scattering by compositing bloom with fog
Proof of concept blurring high-frequency fog detail via a bloom composited with the fog, plus its limitations.
bsky.app · Jun 2025 - Technically Art issue 141 (17 Jan 2025)
Curated weekly roundup of shader, VFX and tech art posts and links.
halisavakis.com · Jan 2025 - Technically Art issue 140 (22 Nov 2024)
Issue of the tech art newsletter collecting insightful Bluesky posts about shaders, VFX and tools.
halisavakis.com · Nov 2024 - @halisavakis.com: depth-offset rim lighting that follows light direction
Stylized rim light from depth offset instead of thresholded fresnel, reacting to light direction; pairs well with cel shading.
bsky.app · Nov 2024 - @halisavakis.com: TotK-style fluid trails on volumetric height fog
Renders a sphere top-down into a buffer, then displaces and blends a custom render texture to leave distorted fog trails.
bsky.app · Nov 2024 - @halisavakis.com: noisy raymarched volumetric fog in about 70 lines
Minimal Unity raymarched fog shader with noise, boilerplate included, in roughly seventy lines.
bsky.app · Oct 2024 - @halisavakis.com: sampling Adaptive Probe Volumes inside volumetric fog
URP fog sampling baked APV data, so emissive objects baked into probes light the fog.
bsky.app · Oct 2024 - Shader bits: World space reconstruction, orthographic camera texture projection & fake perspective UVs – Harry Alisavakis
Shader snippets for world space reconstruction and orthographic camera texture projection.
halisavakis.com · ~Mar 2022 - ShaderQuest Part 6: Shaping functions
ShaderQuest part six on shaping functions in shaders.
halisavakis.com · Sep 2021 - ShaderQuest Part 5: Shader code syntax & Colors – Harry Alisavakis
ShaderQuest series part covering shader code syntax and colors.
halisavakis.com · ~Apr 2021 - ShaderQuest Part 4: Shader Environment Architecture – Harry Alisavakis
ShaderQuest series part on shader environment architecture.
halisavakis.com · ~Mar 2021 - ShaderQuest Part 3: Shaders and Materials – Harry Alisavakis
ShaderQuest series part on shaders and materials.
halisavakis.com · Feb 2021 - ShaderQuest Part 2: Introducing Shaders – Harry Alisavakis
ShaderQuest series part introducing shaders.
halisavakis.com · Jan 2021 - ShaderQuest Part 1: Graphics Concepts – Harry Alisavakis
ShaderQuest series part on core graphics concepts.
halisavakis.com · ~Jan 2021 - ShaderQuest Part 0: Series Introduction
Introduction to the ShaderQuest series on learning shaders.
halisavakis.com · Jan 2021 - My take on shaders: VFX Master Shader (Part I) – Harry Alisavakis
First part of a VFX master shader tutorial.
halisavakis.com · ~Jun 2019 - Shader bits: Camera depth textures – Harry Alisavakis
Shader snippets for sampling the camera depth texture.
halisavakis.com · ~Jan 2018 - Shader bits: World and screen space position – Harry Alisavakis
Shader snippets for getting world and screen space position.
halisavakis.com · ~Nov 2017 - Shader bits: Camera distance, view direction and normal vectors – Harry Alisavakis
Shader snippets for camera distance, view direction and normal vectors.
halisavakis.com · ~Nov 2017 - Archive – Harry Alisavakis
Harry Alisavakis's archive of shaders, scripts and resources.
halisavakis.com