Yes, you can use a green tarp as a green screen, especially if you are not using hot studio lights.
Here's a breakdown:
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Suitability: Bright green tarps can serve as an affordable alternative to professional green screens, particularly in situations where precise color matching and optimal lighting control are less critical.
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Lighting Considerations: The reference explicitly mentions that this works well when not using hot lights. This is important because hot lights can cause uneven lighting and reflections on the tarp, which can complicate the keying process.
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Alternative: If you have hot lights, consider buying a green screen specifically made for studio use, which will provide more professional results.