Right after you exit the pipe in the beginning of this level, if you stand at a particular position and look at the right angle, you’ll see that the water puddle nearby will have the skybox texture:
Video demonstration:
https://www.youtube.com/watch?v=R_tPiZuDqpU
All settings maxed out except AA which is disabled. Also tried lowering shader, water reflection, shadow and disable HDR but the problem still exist.
map: bm_c2a4a
setpos: -2005.734985 -655.657288 -122.995560;setang 2.471316 64.932190 0.000000