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I'm rendering long animations and it's important to me to save time. In the preview, a frame is rendered in 30 seconds, but if I render the animation, the render time of one frame increases to 2 minutes. Why does this happen and how can I get the final render with time of the preview render? Viewport Render Screenshot

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Nisu
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    Do you use the same amount of samples for preview and render? (You can find and adjust the values in the Sampling section of the Render tab) – Cebbi Dec 06 '16 at 11:01
  • Yep. So, preview render working faster even at a glance. – Nisu Dec 06 '16 at 12:01
  • Could you upload the .blend file to http://blend-exchange.giantcowfilms.com/ please? – Cebbi Dec 06 '16 at 12:03
  • I didn't find a solution yet. I deleted everything in the scene, disables motion blur, light bounces, resolution and tile size ... and it's an even bigger factor with CPU. Now I don't know what else to try. – Cebbi Dec 06 '16 at 13:12
  • I'm surprised) I thought that preview time must be equivalent to final render time. But thank you for trying. – Nisu Dec 06 '16 at 14:44
  • No ,the render time of preview and final render vary depending on the settings for rendering (number of samples, and other factors) please read this post to understand the difference:http://blender.stackexchange.com/questions/2728/what-are-the-technical-differences-between-f12-render-and-viewport-preview –  Dec 06 '16 at 14:50

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