PostUP includes a built-in preview feature that lets you test AI prompts without having to scan in as a fan. When creating or editing an AI filter, look for the Generate preview feature next to the prompt field. You can use the default test image (Mr. Bean), upload a photo from your desktop, or take a selfie using your camera. Click 'Generate' and the system will produce four example images showing what the AI filter will create using the OpenAI engine. This takes a few seconds to load and gives you a clear picture of whether your prompt is producing the desired results. This preview workflow is especially helpful for fine-tuning prompts — if the examples don't match your vision, you can adjust the prompt text and generate new previews until you're satisfied with the output. If you like one of the generated examples, you can save it and use it as the thumbnail that fans will see when selecting that filter option.
