Capture a whimsical holiday scene featuring a beautifully decorated Christmas tree in a cozy living room. The composition should include warm, golden hour backlighting filtering through the frosted windows, creating a soft and inviting ambience. Use a Canon EOS R5 with a 35mm f/1.4 lens set to f/2.8 for a shallow depth of field that blurs the background slightly, emphasizing the intricate ornaments on the tree. Incorporate rich, warm colors reminiscent of vintage Kodak Portra 400 film, such as deep reds, lush greens, and soft golds. Add textures of plush fabrics like velvet on the couch and the shimmering tinsel hanging on the tree to enhance the warmth of the scene.