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I am drawing a grease pencil layer over my subject based on a specific camera angle. The camera is locked, and the grease pencil strokes are being drawn while looking through it.

In order to draw the grease pencil layer properly, I need to be rendering the subject. However, if I viewport render, it impacts performance too much to comfortably draw. So I need some way to run a render and paint the grease pencil over it. I could render the subject and then paint over it with grease pencil in post, but I'm trying to keep the whole thing dynamic as there are other grease pencil elements that are not camera specific.

Is there a way to project a render back within the camera bounds so that it exactly lines up with the subject? Is there some other way to handle this issue?

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The Background Images features for Cameras lets you do this easily. It lets you choose an image that will show in the Camera, with a variety of options for placement. If you choose Render Result and leave the rest default, then your render will exactly overlay the model. You can then hide the model and paint your grease pencil as needed.

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  • $\begingroup$ Can you expand upon this? Its god to know that is it possible, but would be much better with a bit of explanation. $\endgroup$ – David Apr 20 at 1:35

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