Before and after shot of what I’ve been working on recently. No actual Photoshop was used – just adjustment brush layers in LR. I tried to be thorough with reflections like the edges of the tunnel and elbows/knee of the soldier.
The “tunnel” is really the hollow part of the bottom of a wall-topper, where the cement binds. Said cement is the crumbled debris around the tunnel along with some “burning” moss.