Fact:

Over a decade ago a scandal occurred in the game industry: the new game Medal of Honor: Warfighter was showing the GPNVG — Panoramic Night Vision Googles.

The team behind the game consulted with real navy seals, who were using this upgraded and fully customizable models and got full documentation with tactical usage scenarios. It was a classified data.

PNVG is a corner-clearing device that is only reasonable in very dark and tight spaces. It's perfect for operations inside small buildings at night.

A few month later PNVG started to appear in movies and all across the media, making this iconic design and its workflows obvious to anyone, including to the people against whom it was supposed to be used.

Navy Seals, who leaked the data and both game and movie studios, who got it and made it public weren't actually punished.

Have I just added a Posterization effect to my ridiculously sophisticated Godot 4 Color Correction and Screen Effects Visual Shader? Yes!

Posterization in this case works only with LUMINANCE, which means, it only cut VALUE of color (Not Hue or Saturation).

A bit of explanation for ones who are reading all these: we take RGB in the end of all changes of our shader, convert it to HSV (Hue, Saturation, Value), and cut Value (or Brightness) into slices and assign them with one specific color each. And then combine + convert it back to RGB, but this time Brightness can only be in steps.

For some games, same workflow must be applied to HUE and Saturation as well.

Additionally, I'm using predefined values for slices, but you can turn them into parameters.

And last but not least: it works well with Pixelization and adds a bit more of Retro feel into it.

https://github.com/ArseniyMirniy/Godot-4-Color-Correction-and-Screen-Effects

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