The Preview window simulates the job before it runs. If preview is wrong, the actual run will be wrong (or different from what preview shows in a way that is also a problem).

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Preview looks wrong: preview shows something that does not match the canvas or the expected output.
Preview is blank: preview renders empty.
Preview is slow: preview takes a long time to generate.

BeamBench is free, and our other projects fund it. For makers: Craftgineer (AI tools for machine-ready art) and PrintCutCarve (machine-tested design files). Outside the workshop: Journtell turns family memories into written story books.

Start position is wrong

The job started in the wrong place. The head ran but landed off the material or far from where you expected.

Preview looks wrong

Preview differs from what you expect, or differs from what actually runs.

Preview problems

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