Create Custom Mask?

[enamic5]

Hello.

I have recently seen some Lightroom presets showing lens flares and light leaks and such.
I wanted to create some for myself. And thought... the easiest would be to create a shape in Photoshop (maybe derived from a real lens flare), and then... somehow get that into lightroom.

I tried importing an image, creating a luminosity mask. But then there is no way to actually convert this into a standard / brush mask. Like a 'flatten masks' tool for example.

So - is there another way to copy, paste or import a custom mask into lightroom?

Or is the only way to do this, to actually repaint that mask with a brush in lightroom?

Thank you.

[AxelMatt]

...

So - is there another way to copy, paste or import a custom mask into lightroom?

Or is the only way to do this, to actually repaint that mask with a brush in lightroom?

By @enamic5

There's no way to copy/paste or import a mask into Lightroom. The only way is to create a mask in Lightroom by using the appropriate LR tools.

[Suzanne Mathia]

You could create a preset by importing a medium grey image. Create you effects for lens flare and light leaks using the varius radial tools brushes etc then save as a preset

[enamic5]

Hello. thank you. Yes – that is what I started doing. Basically just repainting them in Lightroom. 
I was just hoping for a quicker way. For example the import of a BW image with the graphic element, then a luminosity mask, but – that obviously changes when applied to a new image, as there is no way to 'flatten' the AI masks to a simple mask.
Ah well - repaint it is then.
thank you.

[Ian Lyons]

Below linked video tutorial might help get your creative juices flowing.

https://www.youtube.com/watch?v=zhKVjkxCC48

[enamic5]

Yes – I saw that the other day. It is great and really helpful. thank you.