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CRT monitor with curvature, scanlines and shadow mask

In your harnessGodot shaderMIT

Make the screen look like a curved cathode ray tube: barrel-curved image with rounded black corners, horizontal scanlines, an RGB aperture mask, glow from blurred mip levels and a vignette.

Render of CRT monitor with curvature, scanlines and shadow mask
The render its check recorded in Godot 4.7.2, 256 by 256 pixels.

What it takes and gives

Shader type
spatial
Render modes
unshaded, cull_disabled, depth_test_disabled, depth_draw_never, skip_vertex_transform, fog_disabled
Parameters
screen_texture (sampler2D), curvature (float = 0.12), scanline_pixels (float = 3), scanline_strength (float = 0.45), mask_strength (float = 0.3), mask_pixels (float = 1), glow (float = 0.25), vignette (float = 0.6) and 2 more
Use it on
A MeshInstance3D with a 2 x 2 QuadMesh, material.tres as its material override and a large extra cull margin, as in demo.tscn.
Result
The scene curved inside a rounded tube frame with fine dark scanlines, coloured stripes and a soft glow.
Renderers
compatibility: compiled and rendered, forward plus: not verified, mobile: not verified
Placement
res://baltor/godot_shaders/post_crt_monitor/

Limits. The aperture mask is tied to screen pixels and creates moire when the output is scaled. Curvature crops the picture edges. Glow depends on the screen texture's mipmaps. The pass reads Godot's screen texture after opaque geometry, so transparent objects drawn after it are not processed and its order among other transparent passes is not controlled.

Details

Kind
Godot shader
Engine
Godot 4.3 or later
Files
11 files, 166.6 KB
Licence
MIT
Declared effects
reads files, runs commands
Checked with
Godot 4.7.2, opengl3 compatibility (Mesa llvmpipe, Xvfb)
Checks
contract static, engine run, engine log clean, shader in scene, capture written, render not uniform, shader changes pixels
Techniques
Barrel coordinate warp, Cosine scanlines, Aperture grille mask by screen column, Mip-level glow
Tags
godot shader, spatial, post-process, crt, retro, scanlines, shadow mask, full-screen
Identity
library.supply.creative_originals.b716b0d2d014c92f0329bab7.7b04d4fea4194f7c
Version
7b04d4fea4194f7c023a6f801b97c5fe67b02bc9e481dc4aada0303352d63221

The version is the SHA-256 of the item your harness downloads; every file in it names its own checksum.

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