scanlines

type: "scanlines"

CRT bands drifting across the screen.

Fields

Every screen effect also accepts screen_layer and the shared definition fields (duration, easing, loop, persistent, fade_ticks, sound).

Field	Type	Default	Meaning
intensity	float	0.3 (fades to 0)	Band visibility
line_count	float	3	Bands per 100 screen pixels
speed	float	0.5	Downward drift speed

Example

{
    "type": "scanlines",
    "duration": 60,
    "params": { "intensity": 0.3, "line_count": 3, "speed": 0.5 }
}

/vfx play vfxweaver:scanlines {[line_count:6]}

Code

/vfx play vfx_demos:show_scanlines

Its datapack definition:

{
    "type": "scanlines",
    "duration": 160,
    "easing": "ease_in_out_cubic",
    "persistent": true,
    "loop": true,
    "fade_ticks": 12,
    "params": {
        "intensity": {
            "keyframes": [
                {
                    "time": 0,
                    "value": 0.0
                },
                {
                    "time": 80,
                    "value": 0.22
                },
                {
                    "time": 160,
                    "value": 0.0
                }
            ]
        },
        "line_count": 3.0,
        "speed": 0.4
    }
}