A breathtaking, ultra-detailed masterclass fine-art painting celebrating 'Happy Diwali', featuring a grand ancient Indian sandstone palace courtyard illuminated by thousands of glowing terracotta diyas. The courtyard floor is adorned with an intricate, massive colorful Rangoli pattern crafted from marigold flowers, rose petals, and vibrant colored sand. Endless rows of warm golden oil lamps cast dramatic volumetric light and long shadows across ornate carved stone pillars and arches. Floating golden sparks and atmospheric warm haze fill the evening air. Masterclass color contrast between deep twilight sky and glowing amber firelight, definition of High Visual Impact and Technical Skill, 8k resolution, masterpiece.