A soaring and majestic Gothic cathedral, the Grand Cathedral of **Xi Ursae Majoris Aa g – Keplerus**, constructed with living-wood beams and vaulted ceilings open to bioluminescent canopies. Moonlight and light from a distant second sun filter through translucent leaf membranes, illuminating lush, fantastical flora. Grand, epic pipe organs crafted from resonant native sequoia trunks fill the space, their tones harmonizing with natural forest sounds. Pentecostal worshipers, detailed and diverse, fill the cathedral, reciting the Lord's Prayer in unison. Rendered in a detailed matte painting style with deep, complementary colors and intricate detail, reminiscent of fantasy concept art trending on Artstation. Cinematic lighting, 8k resolution, Unreal Engine 5.