Painting Sharpening And Resolution Enhancement While Maintaining Originality

First generate an original textured landscape painting reference: a small expressive oil painting of a quiet riverbank at dusk, with visible brushstrokes, muted natural colors, and no recognizable existing artwork. Then use that generated original painting as the source reference for the main image. Ultra-high resolution 8K professional upscale and sharpening of the generated original painting, 100% faithful to the original artwork, preserve all original composition, subject details, color palette, brushstroke texture, artistic style, lighting, and every existing element exactly as they appear, no modifications, no added or removed content, crisp clear edge definition, reduce digital noise, enhance fine detail clarity without over-saturating or over-processing, maintain the original art's authentic creative intent, museum-grade digital restoration quality