Using Rendero
- What to bring
- One source image and one intended change to compare across the models available in your account.
- What you can do
- Choose from the model and 1K, 2K or 4K options available on your plan. Reference support and delivered image dimensions vary by model; check the downloaded result.
- What to check
- Compare the edited area and its surroundings against the same source. Include rejected attempts and corrections when assessing the result and its credit use.
See the details to inspect around a selection
How credits work
Free accounts receive 50 starting credits once at signup. These credits do not refill each month.
Rendering charges vary with the model, resolution and, for some engines, processing time. Upscaling uses additional credits. The app shows your remaining balance.
Allow for retries and edits when planning a project. A credit balance does not represent a fixed number of finished images.
By Rendero | Model guide updated 8 September 2026
This guide covers Stable Diffusion, Nano Banana 2, Nano Banana Pro and GPT Image 2. Available engines and resolutions depend on your plan; check the model selector and subscription details in your account before following settings from an older tutorial.
Use the exact model name
Nano Banana 2 and Nano Banana Pro are different models. Google's image-generation documentation identifies them as Gemini 3.1 Flash Image and Gemini 3 Pro Image. Both support image generation and editing. The original Nano Banana name refers to Gemini 2.5 Flash Image, so an older tutorial may describe a different model.
OpenAI documents GPT Image 2 as an image generation and editing model. Provider descriptions establish general capabilities; they do not show which engine will preserve a particular facade more reliably inside Rendero.
We have not published a matched architectural rendering test of these engines. The selection benchmark measures masks; use it to inspect selection quality, not to choose an image-generation model.
Compare one architectural task
For a facade material study, use the same source view and the same intended change. Record the model name, resolution, prompt, reference images and available controls. Settings may differ between engines; note that difference rather than assuming identically named controls behave the same way.
- Compare the finish with the material direction you requested.
- Check window corners, frame widths, roof edges and the entrance against the source.
- Keep rejected attempts as well as the preferred result.
- If time or cost affects your choice, record actual elapsed time and credit use for each attempt.
A useful result needs a specific reason for acceptance. "The entrance stayed readable and the window layout matched the source" tells a colleague more than "this model is better."
Review changes outside the intended edit
A detailed prompt can describe what should stay fixed, and a selected region can focus an edit. Neither guarantees unchanged surroundings. Use the selection-boundary guide to check both the edit and its neighboring details.
Carry any approved change to dimensions, openings or material specifications back into the model and project documentation.