Almost every disappointing AI render starts with the source image, not with the AI. These are the seven things that go wrong most often — and what to do instead.
Of all the mistakes this one hits the result hardest, and it is the only one you cannot correct afterwards. A lower viewpoint immediately gives you a calmer, more architectural image.
All of these take a minute to fix — before you hit Render.
What happens In a near-black image there is no telling where the wall ends and the furniture begins.
Do this Set your SketchUp scene to standard daylight and export that. Ask for evening or night mood afterwards with the lighting control — that works better than feeding in a dark source image.
What happens An all-white or all-grey model gives no hints at all. Sherpa fills in something itself, and that is exactly the moment you think: this is not my design.
Do this Give surfaces at least a rough colour or material — wood, concrete, carpet. Rough is enough; it is about direction, not finish.
What happens Axes, toolbars, blue selection highlights and shadowless silhouettes all end up in the render.
Do this Export your viewport as an image, or render straight from the SketchUp extension — it captures the viewport only, no interface.
What happens 4K costs two credits. While you are still searching for the right mood you pay double for images you throw away anyway.
Do this Find the composition and the mood at 2K. Happy with the image? Upscale it to 4K afterwards — available on every successful render.
What happens Running the same render again gives you a different image, but not necessarily the image you wanted. Every attempt costs a credit.
Do this Mood almost right? Use “edit this image” and describe what should change. Base not right? Go back to your export and fix it there.
What happens A single image says little. One detail you dislike and you write off the whole thing.
Do this Count on three images from different scenes before you decide. That is what your free renders are for — feel free to spend a couple of them.
Five rules. Get them right and the same five free renders take you considerably further.
Mistake 5 again, but the other way round: from a successful image you keep working instead of starting over. Four detail shots from this same image — 2 credits together, without re-rendering.
All four come from the render above. No new export, no second attempt.
An export at eye level with straight verticals, standard daylight and roughly assigned materials. The image does not need to be finished — it needs to be readable: what is wall, what is floor and what is furniture has to be visible.
Usually because the source image carries too little information. With a white or grey model without materials the AI fills in material and mood itself. Give your surfaces a rough colour or material and the result stays much closer to your design.
A render that fails technically costs you nothing — that credit comes back. A render that succeeds but you do not like does cost a credit. Which is why it pays to check your source image before you hit Render.
No. 4K costs two credits instead of one. Find the right composition, mood and styling at 2K first, then upscale to 4K once it is right.
In the SketchUp extension you do that with Straighten view: choose Verticals, Horizontals, Both or + Center. Sherpa moves your camera and takes a fresh capture. Straightening costs no credits.
More background: what AI rendering is · rendering from SketchUp
Five free renders, no credit card. With an export that meets the five rules you see straight away what Sherpa is for.