3D Heart Voxels

import matplotlib.pyplot as plt
import numpy as np

n = 12
voxels = np.zeros((n, n, n), dtype=bool)

# Create grid of small cubes
for i in range(0, n, 4):
    for j in range(0, n, 4):
        for k in range(0, n, 4):
            voxels[i:i+2, j:j+2, k:k+2] = True

# Yellow-lime #D3F527 with position variation
x, y, z = np.indices((n, n, n))
colors = np.empty(voxels.shape + (4,), dtype=np.float32)
colors[..., 3] = 0

# D3F527
colors[voxels, 0] = 0.83
colors[voxels, 1] = 0.96
colors[voxels, 2] = 0.15
colors[voxels, 3] = 0.9

fig = plt.figure(figsize=(10, 8), facecolor='#020B14')
ax = fig.add_subplot(111, projection='3d', facecolor='#020B14')

ax.voxels(voxels, facecolors=colors, edgecolors='#1e293b', linewidth=0.4)

ax.set_xlabel('X', fontsize=11, color='#94a3b8', labelpad=10)
ax.set_ylabel('Y', fontsize=11, color='#94a3b8', labelpad=10)
ax.set_zlabel('Z', fontsize=11, color='#94a3b8', labelpad=10)
ax.set_title('Cubic Shell Grid', fontsize=14, color='white', fontweight='bold', pad=20)

ax.tick_params(colors='#64748b', labelsize=8)
ax.xaxis.pane.fill = False
ax.yaxis.pane.fill = False
ax.zaxis.pane.fill = False
ax.xaxis.pane.set_edgecolor('#1e293b')
ax.yaxis.pane.set_edgecolor('#1e293b')
ax.zaxis.pane.set_edgecolor('#1e293b')
ax.grid(True, alpha=0.2, color='#475569')

plt.tight_layout()
plt.show()