And you could use little more darker textures perhaps or is it the lightening,
caus they are flashing for me.

Another little thing : you could use bigger textures sizes or reUVmap them or
rework them :
caus we see easily their repetitive pattern.

Apprt from that you can also find a very good tutorial and example ready ot use on AUM56 (made by George : the best way to learn and use 3DGS).