AaronWizard 2018
A Godot screen shader for simulating CRT screens.
Based on the CRT-Easymode algorithm.
Create a node that covers your scene, like a ColorRect, and assign it a ShaderMaterial that uses the CRT shader code. You will likely want this node to go in a CanvasLayer, like if you're using a Camera in the scene.
The shader's parameters are taken from the original CRT-Easymode shader, but with the addition of Screen Base Size. The most important parameters are:
| Shader Param | Description |
|---|---|
| Screen Base Size | The virtual minimum pixel dimension, width or height, of the scene. This should be the minimum of your Width and Height settings under Project Settings > Display > Window > Size. |
| Mask Strength | How much the original scene's colours will be replaced by the colouring of the RGB cell pattern. |
| Mask Dot Width | Multiplier for the widths of the RGB cells, based on Mask Size. |
| Mask Dot Height | Multiplier for the heights of the RGB cells, based on Mask Size. |
| Mask Stagger | Shifts the odd row RGB cells by this amount multiplied by Mask Size. |
| Mask Size | The base width and height in screen pixels of the RGB cells. |
| Scanline Strength | How visible the scanlines are. |
| Scanline Cutoff | The minimum height the screen must be in order to show the scanlines. |
| Gamma Input | Represents the gamma of the simulated CRT monitor, which was typically between 2 and 5. Darkens the scene the higher this is. |
| Gamma Output | The corrected gamma converted from Gamma Input for display on an LCD monitor. Brightens the scene the higher this is. |
| Bright Boost | Brightens the scene depending on how high the value is, independent of the gamma settings. |
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