Create a highly detailed, psychedelic design for a t-shirt in the style of psytrance. The design should feature vibrant neon colors such as purples, greens, and pinks, with intricate geometric patterns, fractals, and sacred geometry shapes like mandalas and spirals. Incorporate elements of nature, such as glowing mushrooms, abstract trees, and cosmic motifs like stars and galaxies. The composition should feel otherworldly and trippy, with fluid, flowing shapes, optical illusions, and intense textures. The central theme should evoke a sense of mystical connection with the universe and transcendence