To make a painting glossy in Photoshop, follow the steps given below:
- Click Filter.
- Select Render and then Lighting Effects.
- Now on the right-hand side, a window appears where you could alter the value of Gloss.
- Slide it to 100.
- If you want the Gloss effect over your entire image, choose ‘Infinite’ as the effect style from the drop-down menu.