Nano Banana renders for SketchUp, without writing prompts

Paste a SketchUp screenshot into a chat with a short line like "make this photorealistic" and the model has a lot of freedom. It reads the image as a suggestion, not a drawing. The same few problems come up again and again.

• The roof gets redesigned: a flat roof turns pitched, or a shallow pitch gets steeper.
• An extra floor, a parapet or a dormer appears.
• Windows change count, size or spacing.
• The red, green and blue axis lines stay in the picture as poles or painted stripes.
• Section planes and guide lines turn into glass panels or cables.
• Black edge lines become dark trim on every corner.
• The camera is reframed, so the horizon and lens no longer match your view.

You can, but each test costs a round, and a prompt that works on one view often fails on the next. A tilted camera, a dark interior or a busy context brings back a different problem each time.

SketchUp views add their own traps. Default colors look like intended finishes, so a beige default face may come back as beige stucco. Shadows drawn by SketchUp can turn into dark paint. The ArchFor recipes were written and tested against these cases, and the same text runs on every view, so results are more predictable from one view to the next.

The preset is a written recipe that goes to the model with your image. It names your upload as the authority on form and says which marks to drop. Here is the same screenshot, handled two ways.

This is best effort. These are AI images, not CAD, and fine parts such as mullions or railings can still move.

1. Export the view with File → Export → 2D Graphic, or take a screenshot of the viewport.
2. Upload it to ArchFor. Input stays on Model screenshot.
3. Choose Exterior, Interior or Landscape.
4. Pick one of six styles: Warm timber, Modern minimal, Concrete & glass, Scandinavian, Mediterranean or Industrial.
5. Pick Day, Golden hour or Night.
6. If needed, add a note such as "zinc roof, larch soffits".
7. Choose 1K, 2K or 4K and render.

Every image runs on Nano Banana 2.1; you only choose the size. 1K costs 1 credit per image, 2K costs 2 and 4K costs 3, so a round of 4 is 4, 8 or 12 credits.

Use 1K for a quick, cheap preview of massing and style. 2K, the default, suits screens and client reviews. 4K is generated at 4K, not upscaled, so it takes longer and the files are large; keep it for print boards. Follow-up actions such as Brighter or Night start at the size of the image you adjust.