ChatGPT (DALL·E) · GPT Image 2 (ChatGPT)

Cinematic Observatory Dome Interior at Night

Tested: 2026-08-08

3:2 · 768 × 516

The prompt

Prompt

A cinematic film still, the interior of a vintage observatory dome at night, a large brass telescope angled up through the open slit toward a starfield, a cool blue shaft of starlight and moonlight raking down onto the telescope tube and the wooden floor, a single warm desk lamp on a small study table in the corner casting a warm pool over an open star chart and a coffee cup, the warm pool balanced by the cool blue shaft filling the rest of the dome, slow rotating dome mechanism suggested by a partly-open opposite shutter, 35mm lens, shallow depth of field on the star chart, mixed colour temperature of warm tungsten and cool moonlight, no people, no text, no letters, no watermark

How to use this prompt

1
Open the generator that matches the model and version above, and start a new image rather than editing an existing one.
2
Set the output to 3:2. That is the only output setting recorded for this entry, and it is what produced the 768 × 516 image on this page.
3
Paste the prompt exactly as written. Changing the wording changes the image, so copy it before you edit.
4
Generate, then change one thing at a time. The result will not be pixel-identical to the image on this page, because no seed is recorded for it.

Only an aspect ratio is recorded for this entry. GPT Image and DALL·E do not expose a sampler, step count, or CFG value in the interface this was tested in, so there are no numbers to match — the prompt text and the aspect ratio are the whole instruction. Resize by describing the framing in words rather than reaching for a parameter.

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The prompt

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