Create a stunning 4K image of a tree with skulls hanging from its branches instead of fruit. The tree should be realistic and highly detailed, with gnarled bark and twisted branches. Each skull should be distinct, with some showing intricate carvings or eerie glowing eyes. The scene should have dramatic, high-quality lighting that casts deep shadows and highlights the macabre details. Surround the tree with a dark, atmospheric background that enhances the eerie, otherworldly vibe. Render it with photorealistic quality and incredible detail