Original

Created

Open file.

Choose an image and open.

Hold shift key to scale the image.

Edit the size of the artboard according to the size of the image.

Double click on the image. In the Layer Options, choose Template > Dim Images to : 100 (100-200).

Create a new layer.

Trace the image.

Use Gradient Tool to paint it.

Add images and Make Clipping Mask.

Done.