1. Open up a photoshop file with something like a box or even a content box am using a simple box for this sime light effect.
2. Create a oval looking circle shape at the top of the box
3. Now fill the circular shape with white.
4. Now by pressing CTRL+G will switch the layer style to overlay this will show the top part of the shape that you filled with white will appear and be shown back up with the white shape on top.
5. And now we need to make the opacity smaller so it makes the white light and see through and you're done.
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