# CRT Monochrome Shaderpack<\/p>\n
> *”End of Line.”*<\/p>\n
**CRT Monochrome Shaderpack** is a lightweight GLSL shader pack for Minecraft Java Edition (Iris\/OptiFine) that replicates the high-contrast, phosphor-display aesthetic of early 80s computing.<\/p>\n
It replaces standard rendering with a strict two-tone wireframe\/threshold visualization, simulating a monochromatic CRT monitor inside the game.<\/p>\n
## \ud83d\udda5\ufe0f Visual Style<\/p>\n
### The “P1″ Phosphor Aesthetic
\nBy default, the pack utilizes the **”P1 Apple Green” (#33FF33)** color scheme, mimicking the high-persistence green phosphor monitors of the Apple II era. The world is rendered as a stark contrast between illuminated geometry and a pure black void.<\/p>\n
### CRT Emulation
\nThe pack includes a fully procedural CRT post-processing stack:
\n– **Screen Curvature:** subtle geometric distortion to mimic a curved glass tube.
\n– **Scanlines:** Horizontal beam lines that scroll slowly with time.
\n– **Chromatic Aberration:** Slight RGB channel separation at the screen edges.
\n– **Vignette:** darkening at the corners to simulate tube depth.<\/p>\n
## \u2699\ufe0f Technical Features<\/p>\n
– **Depth-Based Rendering:** Uses Sobel Edge Detection and luminance thresholding on the depth buffer to generate outlines and solids.
\n– **Optimization Friendly:** Extremely low GPU overhead. Disables standard lighting, shadows, and PBR calculations.
\n– **”Hall of Mirrors” Fix:** Includes a custom Sky Shader module that forces a depth buffer clear. This prevents the “smearing” artifacts common when using optimization mods (like Radon\/Sodium) that disable vanilla sky rendering.
\n– **Driver Support:** Compatible with both NVIDIA and AMD GPUs (OpenGL 3.0+).<\/p>\n
## \ud83c\udf9b\ufe0f Configuration<\/p>\n
While the default is Green, the pack is fully configurable via the **Shader Options** menu in-game.<\/p>\n
### RGB Color Channels
\nYou can manually mix the phosphor color using 0-255 sliders.
\n– **Classic Amber:** R: 255, G: 176, B: 0
\n– **Macintosh White:** R: 229, G: 251, B: 255
\n– **Neon Purple:** R: 214, G: 3, B: 220<\/p>\n
### World Settings
\n– **Contrast Threshold:** Controls the sensitivity of the edge detector (higher = darker world, lower = more noise).
\n– **Void Distance:** Sets the strict cutoff distance where the grid fades into black.
\n– **CRT Effects:** Sliders to adjust or disable Curvature, Scanline Intensity, and Aberration.<\/p>\n
## \u26a0\ufe0f Known Issues & Troubleshooting<\/p>\n
### The “Hall of Mirrors” (Smearing) Effect
\nIf you see the screen “smearing” or trails following your movement, your Depth Buffer is not being cleared correctly.
\n– **The Cause:** This usually happens with high-performance custom clients or mods that disable the vanilla sky rendering to save FPS. Without the sky pass, the command to clear the previous frame’s depth data is never sent.
\n– **The Fix:**
\n 1. Ensure **Sky Rendering** is enabled in your client settings.
\n 2. If you are a developer using a custom rendering engine, ensure the depth buffer bit is cleared at the start of the frame. <\/p>\n
### Items appear as “Blobs” or lack detail
\nIf hand items look like solid blocks of color:
\n– Adjust the **Contrast Threshold** in the shader options.
\n– Lowering the threshold will make the detector more sensitive to smaller depth changes, revealing more detail on close-up objects.<\/p>\n
## \ud83d\udce5 Installation<\/p>\n
1. Download the `.zip` file.
\n2. Place it into your `.minecraft\/shaderpacks` folder.
\n3. Launch the game using **Iris** or **OptiFine**.
\n4. Select **CRT Monochrome Shaderpack** from the Shader list.<\/p>\n
*Note: For the best experience, ensure “Render Regions” is enabled if using OptiFine.*<\/p>\n
## \ud83d\udce3 Streaming & Content Creation
\nIf you feature this shader pack in a stream or video, please provide credit by linking to the official project page or mentioning **h1ggsk**. I\u2019d love to see what you create with it!<\/p>\n
## \ud83d\udce6 Modpack Policy
\n– **Permission Granted:** You are free to include the `CRT Monochrome Shaderpack` in modpacks hosted on **CurseForge** or **Modrinth**.
\n– **Requirement:** The modpack must use the official project dependency\/link so that downloads are tracked through the original source.
\n– **Prohibited:** You may not re-upload the shader pack as a standalone file or host it on third-party “mirror” sites.<\/p>\n
## \ud83d\udcc4 License<\/p>\n
**Copyright \u00a9 2026 h1ggsk. All Rights Reserved.**<\/p>\n
This software is the intellectual property of **h1ggsk**. <\/p>\n
1. **Non-Redistribution:** You may not re-upload, mirror, or redistribute this shader pack as a standalone project.
\n2. **Modification:** You may modify the code for **personal use only**. You may not distribute modified versions of the code (“forks”) without explicit written permission from the author.
\n3. **Modpack Exception:** Use in curated modpacks is permitted under the conditions outlined in the “Modpack Policy” above.<\/p>\n","protected":false},"excerpt":{"rendered":"
This shaderpack turns your game into a retro 1980s-style CRT screen<\/p>\n","protected":false},"featured_media":51722,"template":"","meta":{"_minecraft_slug":"crt-monochrome-shaderpack","_minecraft_project_id":"KBmTU8ja","_minecraft_author":"h1ggsk","_minecraft_license":"LicenseRef-All-Rights-Reserved","_minecraft_downloads":4181,"_minecraft_follows":0,"_minecraft_client_side":"required","_minecraft_server_side":"unsupported","_minecraft_storage_type":"zip","_minecraft_archive_name":"crt-monochrome-shaderpack.zip","_minecraft_size_bytes":4624,"_minecraft_version_count":1,"_minecraft_updated_at":"2026-05-16T11:14:13.975083Z","_minecraft_date_created":"2026-01-25T07:54:44.405952Z","_minecraft_date_modified":"2026-01-25T05:02:31.332191Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/crt-monochrome-shaderpack","_minecraft_icon_attachment_id":51722,"_minecraft_imported_at":"2026-06-02T19:57:38+00:00","_minecraft_import_hash":"62e5a15b539bc075f0edf0232406a5be","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[880,892,883,886,887],"mod_loader":[890,891],"minecraft_version":[339,340,341,357,359,360,379,382,385,438,446,449,110,111,112,113,114,115,116,117,118,119,120,46,47,48,49,50,51,52,53,54,55,56,57,58,59,36,60,93,94,101,102,62,37,40,41,73,74,38,78,79,80,81,82,859,166,10,11,12,21,13,14,15,16,17,18,19,20,22,23,24,25,26,27,28,29,30,31,860,861,862,863,864],"class_list":["post-51721","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-atmosphere","mod_category-colored-lighting","mod_category-iris","mod_category-optifine","mod_category-potato","mod_loader-iris","mod_loader-optifine","minecraft_version-1-10","minecraft_version-1-10-1","minecraft_version-1-10-2","minecraft_version-1-11","minecraft_version-1-11-1","minecraft_version-1-11-2","minecraft_version-1-12","minecraft_version-1-12-1","minecraft_version-1-12-2","minecraft_version-1-13","minecraft_version-1-13-1","minecraft_version-1-13-2","minecraft_version-1-14","minecraft_version-1-14-1","minecraft_version-1-14-2","minecraft_version-1-14-3","minecraft_version-1-14-4","minecraft_version-1-15","minecraft_version-1-15-1","minecraft_version-1-15-2","minecraft_version-1-16","minecraft_version-1-16-1","minecraft_version-1-16-2","minecraft_version-1-16-3","minecraft_version-1-16-4","minecraft_version-1-16-5","minecraft_version-1-17","minecraft_version-1-17-1","minecraft_version-1-18","minecraft_version-1-18-1","minecraft_version-1-18-2","minecraft_version-1-19","minecraft_version-1-19-1","minecraft_version-1-19-2","minecraft_version-1-19-3","minecraft_version-1-19-4","minecraft_version-1-20","minecraft_version-1-20-1","minecraft_version-1-20-2","minecraft_version-1-20-3","minecraft_version-1-20-4","minecraft_version-1-20-5","minecraft_version-1-20-6","minecraft_version-1-21","minecraft_version-1-21-1","minecraft_version-1-21-10","minecraft_version-1-21-11","minecraft_version-1-21-2","minecraft_version-1-21-3","minecraft_version-1-21-4","minecraft_version-1-21-5","minecraft_version-1-21-6","minecraft_version-1-21-7","minecraft_version-1-21-8","minecraft_version-1-21-9","minecraft_version-1-5-1","minecraft_version-1-5-2","minecraft_version-1-6-1","minecraft_version-1-6-2","minecraft_version-1-6-4","minecraft_version-1-7-10","minecraft_version-1-7-2","minecraft_version-1-7-3","minecraft_version-1-7-4","minecraft_version-1-7-5","minecraft_version-1-7-6","minecraft_version-1-7-7","minecraft_version-1-7-8","minecraft_version-1-7-9","minecraft_version-1-8","minecraft_version-1-8-1","minecraft_version-1-8-2","minecraft_version-1-8-3","minecraft_version-1-8-4","minecraft_version-1-8-5","minecraft_version-1-8-6","minecraft_version-1-8-7","minecraft_version-1-8-8","minecraft_version-1-8-9","minecraft_version-1-9","minecraft_version-1-9-1","minecraft_version-1-9-2","minecraft_version-1-9-3","minecraft_version-1-9-4"],"yoast_head":"\n