Reshade that sharpen almost everything, to remove the blurry effect of the textures. Also a slight modification on the lighting. The shaders are taken from 2-3 different sources. Those files must be copied at this location
C:\Games\Library\steamapps\common\Star Wars - The Old Republic\swtor\retailclient
Depending where you installed the game
For this to work, you must install reshade 4.9.1 (very important because of the old DX9), put any preset, then rewrite what's in that folder. I fond it more easy that way. Installing that reshade version remove a problem with transparency of lights (like the lightsaber disappearing). It seems that after, you can installed any Reshade version for other games without any issues on SWTOR.
C:\Games\Library\steamapps\common\Star Wars - The Old Republic\swtor\retailclient
Depending where you installed the game
For this to work, you must install reshade 4.9.1 (very important because of the old DX9), put any preset, then rewrite what's in that folder. I fond it more easy that way. Installing that reshade version remove a problem with transparency of lights (like the lightsaber disappearing). It seems that after, you can installed any Reshade version for other games without any issues on SWTOR.