how to use existing bezier curve in mask node

[Zaffer]

Hi,
I have an existing bezier curve that I would like to use as a mask, but I can’t figure out how to get it into the mask node. I opened the image editor in make mode, but I can’t figure out how to get my existing bezier curve into it and from there to the mask node. Any help will be greatly appreciated. Thanks.
Zaffer

[JA12]

How to ask questions effectively on blenderartists.org support forum

If existing bezier curve means you have one in the 3D scene, that’s not available as a mask curve in other editors. Objects can be rendered with transparent background and use the alpha as a grayscale mask. They can also mask other objects as a mask layer in render layer properties, or with Cycles holdout shader.

[Zaffer]

@JA12

https://blenderartists.org/forum/showthread.php?322623-How-to-ask-questions-effectively-on-blenderartists-org-support-forum&p=2547191&viewfull=1#post2547191

If existing bezier curve means you have one in the 3D scene, that’s not available as a mask curve in other editors. Objects can be rendered with transparent background and use the alpha as a grayscale mask. They can also mask other objects as a mask layer in render layer properties, or with Cycles holdout shader.

Thanks JA12. I was afraid of that. That means I can’t make a “mask” in Illustrator, import it as SVG and use it in the mask node, right?

[JA12]

@Zaffer

That means I can’t make a “mask” in Illustrator, import it as SVG and use it in the mask node, right?

Not in the mask node, no. But could still use one in a very similar way, just would have to render it and use it through render layer node or as a pre-rendered image/sequence instead of mask node.

[Zaffer]

@JA12

Not in the mask node, no. But could still use one in a very similar way, just would have to render it and use it through render layer node or as a pre-rendered image/sequence instead of mask node.

Thanks, I’ll try that.