Create a serene digital artwork featuring a grainy gradient background that transitions from warm golden yellows at the bottom to deep blue at the top, simulating a sunset over a tranquil lake. The gradient should have a soft, painterly texture, reminiscent of a delicate canvas, enhancing the warm atmosphere and evoking feelings of calmness and peace. For the lighting setup, utilize soft, diffused lighting that mimics the natural light of a sunset, with subtle variations in intensity to add depth to the gradient. This should create a harmonious balance between the colors, giving a smooth transition that feels organic. Incorporate foreground elements like silhouetted trees or gentle waves to create a sense of depth and interest, while ensuring these elements remain subtly blurred to keep the focus on the gradient. The background should maintain a seamless blend of colors, enhancing the overall tranquil mood. Focus points should emphasize the warm yellows at the bottom, gradually leading the eye upward through the gradient to the cooler blues. The grain texture should be fine and even, providing a subtle tactile quality to the digital artwork, which adds richness without overpowering the gradient itself. Post-production enhancements may include softening the edges and applying a slight vignette effect to draw attention to the center of the image, enhancing its calming allure.