Duplicate the Background layer. You can do this by selecting the Background layer then pressing Ctrl+J (Cmd+J on a Mac). Drag this layer to the top then change the blending mode to Overlay.
Create a new layer and position it as the top layer. Name this layer â€œGlowâ€.
Use the Lasso selection tool to create a selection of the cave like shown in the image below.
Fill the selected area with white (Edit > Fill). Then, press Ctrl+D or Cmd+D to deselect the selection.
Go to Filter > Blur > Radial Blur. Use the settings shown below.
Your blur should look like this. If it doesnâ€™t, undo and try the Radial Blur filter again using a different Blur Center setting.
Next, open the image of the silhouette.
Weâ€™re going to make a selection of it. Select the Magic Wand tool to make a selection like shown in the image below. Your Magic Wand tool should have a Tolerance setting of 32 â€“ you can adjust this in the option bar located at the top of your Photoshop interface.
Go to Edit > Copy. Close the image then switch back to the original Photoshop document we were working on. Go to Edit > Paste and Photoshop will paste the silhouette as a new layer.
Use the Eraser tool to erase the excess area around the man.
Go to Edit > Free Transform. Shrink and position the man like this:
Go to Image > Adjustments > Shadows/Highlights. Set the Amount to 100%. This will reveal some details in the silhouette.
Add another Hue/Saturation layer by going to Layer > New Adjustment Layer > Hue/Saturation. Change the blending mode to Soft Light.
In the Adjustments panel, adjust the settings like this. Remember to checkmark the Colorize option first.
Hereâ€™s what it looks like with the color adjustment.