Script for The Gimp 2.8 which tries to emulate the look and feel of a picture rendered on a CRT

The best results are obtained by using images (from emulators) in the natural resolution. For example, images from an Amstrad CPC should be 320×200 pixels in RGB format.

Beware that the result will be 8 times larger than the original (320×200 → 2560 × 1600). Therefore you should not use images too large that they could not fit into your computer’s memory.

The crt.scm file should be placed in your Gimp directory (on Linux, it is ~/.gimp-2.8/scripts).

The script is accessible via the Filters/Distort/CRT emulator menu.

It requires no parameter.

Here’s a screenshot from the game Cybernoid on Amstrad CPC

after CRT-Emulator

What the script does :

• upscale (×2)
• remove even rows
• upscale (×4)
• flatten
• spread pixels (2×2)
• gaussian blur (8×4)
• curves (brighten)
• lens distortion (main distortion=10, luminosity=20)
• create a layer Noise with black background in lighten-only mode
• generate RGB noise (0.3)
• blur the noise (24×24)