Bubble texture

// Organic Wavy Plate - Fixed Version
// Creates a solid base with overlapping spherical subtractions

/* [Plate Dimensions] */
width = 100;        // X dimension (mm)
length = 100;       // Y dimension (mm)
plate_height = 10;  // Total thickness of the block (mm)

/* [Texture Settings] */
cell_spacing = 10;  // Distance between craters (smaller = more dense)
sphere_radius = 12; // Radius of the carving spheres (must be > cell_spacing/2)
randomness = 4;     // Organic jitter (mm)
sink_depth = 4;     // How deep the spheres sit into the plate
seed = 123;         // Random seed for the pattern

/* [Resolution] */
$fn = 44;           // Faceting of the craters (20-30 looks best)

module organic_plate() {
    difference() {
        // 1. The solid base plate
        cube([width, length, plate_height]);

        // 2. The subtractive texture grid
        // We expand the grid slightly beyond edges to ensure full coverage
        for (x = [-cell_spacing : cell_spacing : width + cell_spacing]) {
            for (y = [-cell_spacing : cell_spacing : length + cell_spacing]) {
                
                // Deterministic randomness based on grid position
                offsets = rands(-randomness, randomness, 2, seed + x + y*10);
                off_x = offsets[0];
                off_y = offsets[1];
                
                // Position spheres so they carve into the top surface
                // Z = plate_height + (sphere_radius - sink_depth)
                translate([x + off_x, y + off_y, plate_height + sphere_radius - sink_depth]) 
                    sphere(r = sphere_radius);
            }
        }
    }
}

// Render
organic_plate();