LED dot matrix spatial

very simple dot matrix shader for 3d objects. this can simulate LED screens

Shader code

shader_type spatial;

uniform sampler2D tex;
uniform vec3 emission_color : source_color = vec3(1.0);
uniform float emission_strength=2.0;
uniform float grid_size = 0.025; // Size of the grid cells
uniform float dot_radius = 0.01; // Radius of each dot

void fragment() {
    vec4 base_color = texture(tex, UV);
    
    // Calculate grid coordinates (center of the cell)
    vec2 cell_pos = floor(UV / grid_size);
    vec2 cell_center = (cell_pos + 0.5) * grid_size;
    
    // Calculate distance from the center of the cell
    float dist = distance(UV, cell_center);
    
    // Create a circular alpha based on distance
    float circle_alpha = smoothstep(dot_radius - 0.01, dot_radius + 0.01, dist);
    
    // If we're inside the circle, show the texture with full opacity
    if (dist < dot_radius) {
        ALBEDO = base_color.rgb * emission_color*emission_strength; // Make it emissive
        ALPHA = 1.0;
    } else {
        ALPHA = 0.0; // Make non-dot areas fully transparent
    }
}

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