Create a detailed fantasy concept art of two guinea pigs performing an enchanting dance, each wearing a delicate tutu. The scene should display intricate details, with a matte painting style. Delve into deep color palettes to render this design, making use of complementary colors to enhance its visual appeal. The background should convey a fantastical atmosphere that captures the movement of the dancing guinea pigs. Please create this image in 8k resolution, as if it's a trending splash screen on a platform like Artstation using a technology similar to Unreal Engine.