galaxy nebula space background purple blue stars
Prompt
Photorealistic deep-space nebula background filling the entire frame, with layered clouds of luminous cosmic gas swirling diagonally across a dark star field. Create a rich purple, blue, cyan, rose, and warm amber palette, with creamy glowing filaments, soft translucent dust, and a deep black-blue void in the lower left for contrast. Scatter tiny sharp stars throughout, including a few brighter starbursts with subtle diffraction spikes, while keeping the nebula texture soft, wispy, and cloudlike. Mood is awe-inspiring, mysterious, and expansive, suitable as an abstract space texture. High-resolution astrophotography look, long-exposure deep-sky telescope capture, crisp micro stars, gentle bloom, natural contrast, no borders.
Negative Prompt
people, faces, spacecraft, planets, recognizable landmarks, logos, watermarks, readable text, oversaturated colors, heavy HDR halos, cartoon style, painterly brush strokes, low resolution, pixelation, compression artifacts, repeating patterns, artificial plastic texture, excessive lens flare