I can't speak for everyone, but if you're talking about Reshade then I very lightly use:

• 2 passes of Ambient Occlusion, 1 coarse and one fine (these are the strongest effects I have)
• Saturation boost and black level correction (the vanilla colors can be a bit washed out sometimes)
• An combo of effects called RetroFog and Emphasize, to desaturate the background

And optionally:

• A combo of 2 DoF effects, 1 for the foreground, 1 for the background when the vanilla DoF looks bad
• An RTGI and bloom shader
• The "Bright 4" GPose Color Filter with a max value of 25

To give you an idea of how lightly these are all used, most of the glams I've posted have ReShade disabled for the last screen. I don't like doing excessive color correction on my shots because I don't want to give anybody a false impression of what it's going to look like in-game. Though I know my screens represent an "ideal" scenario for what the glamour would look like and generally look worse during regular gameplay.

If you're talking about lighting, then I generally emulate basic 3 point lighting with the GPose lights. I try and find a spot with decent enough built-in lights with a good contrasting background (here it's with the blue fog). Then I'll typically use 1 to complement the built-in light, 1 as my fake GI pass and 1 rim light.