Funny to see that people are still learning how to photoshop LFS screenshots. I used to be very passionate about it, but it's basically obsolete these days, as most racing sims look good enough already.
I'll tell you what I see is wrong with the first one:
There are a lot of details that don't add up. Wheels are blurry (spinning), but neither the car nor the scenery are blurred. So it seems like the car is standing there, but with all four wheels spinning? But only the rears are smoking? On a flooded street? No tyre spray? There's heavy rain but only right in front of the camera. We see none of it hitting the street or car and there's a bright sky in the background, doesn't look like a rainy day (also because of the warmth of colours).
Then there's minor details like the reflection should show the floor of the car. Smoke is a bit too bright, also needs to appear thicker (not see-through) and voluminous (highlights and shadowing). Or the spinning brake calipers .
Wow, I didn't expect that someone would react to this post ever again.
Anyways, I did end up giving up hope on this screenshot editing thingy
Still thanks for the very usefull tips tho! I'll make sure I'll think of it if I ever come back to this maybe a couple of months/years later.