then you might want to check these out.
still looking for another addons that doesn't contain unrealism.
Note. The first 3 addons aren't Comaptible with each other but you could try.

• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=238759862&searchtext=
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=123514260&searchtext=
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=133042891&searchtext=
  
• I don't know what this is but i have no idea where to put it so...
  https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=223947299&searchtext=
  
• GM+ and sharpeye (i think) has this already. This was suggested by E-1626 AKA Tardis
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=182279053&searchtext=
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=246697182&searchtext=player

Or if you don't like seeing all your body. this maybe the one you're looking for.
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=112806637&searchtext=realism

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=203262806&searchtext=realism
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=395498330&searchtext=

This isn't really Realistic but hey. certain people can do it so why not.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=254007887&searchtext=bullet+dodge
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=113495466&searchtext=climb+swep
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=242181347&searchtext=parkour
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=173371997&searchtext=parkour
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=142911907&searchtext=climb+swep
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=410645074
Forgot to add this but SMITTYWERBENJAGERBENJENSEN made me remembered it.
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=240159269&searchtext=smart
also a good addon that i saw
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=446022215

Has it bothered you that every time you fall. it only takes 10 hp out of you. then you turn on mp_falldamage to 1 and get killed a lot. you headshot somebody and they're still alive and fine. (i guess). Or you shoot them in the legs and then they're still fast as a squirrel. now all of those are solved using only this addons

• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=137669824&searchtext=enhanced+damage
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=111335690&searchtext=damage
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=105041410&searchtext=damage
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=211652568&searchtext=enhanced+damage
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=283809613&searchtext=damage
  https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=374406939&searchtext=realistic

This one for fixing the unlimited oxygen underwater

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=310100582&searchtext=

Chicken McNuggets Told me that these were pretty badly coded vehicles but i assume it wasn't really that bad, like i said:
I always wanted to drive around in a car but i found out most players just use the same HL2 Cars so say goodbye to old cars and hello to new ones.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=104483020
below here is the Collection of SCar slims. there are many out there.
https://steamhost.cn/steamcommunity_com/workshop/filedetails/?id=149640069

you could always look for more scars out in the workshop.
i added the WAC aircrafts because it's still a vehicle... and part of realism.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=104990330
Ditto
https://steamhost.cn/steamcommunity_com/workshop/filedetails/?id=143024184
--------------------------------------------------------------------------------------------------------
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=486141626

Have you ever wondered why does your player kept falling straight and even the npc. now they will fall ragdollized just like a person would be if they're falling.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=181248973&searchtext=
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=181249475&searchtext=

Told me this were very unrealistic but i really agree to that but it's still fun having it around like chopping their Hands.
Blowing off limbs of npc and splat their whole body
The first one is suggested by 『』sneakyrat『』

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=264403590&searchtext=
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=168326910&searchtext=

You will have to choose between this two because, the first one is only when ragdolled
meanwhile the second addon makes them squirt blood but i think it
goes good with "Bleeding System[1.26]"

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=226619672&searchtext=
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=394682318

This one is for players who likes to gesture and
drops the current weapon when you or someone else died. etc...
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=145640726&searchtext=
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=145939873&searchtext=
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=153246356&searchtext=drop+weapon
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=199226357&searchtext=weapon

I will put some addons here that will replace decals, sounds and other stuffs. i don't think this make the gameplay realistic but if it does then tell me so i can make this better.

• This column will change the way you hear the footsteps and ambience of GMod
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=290431485&searchtext=
  https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=290854409
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=235481161&searchtext=
  https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=269101649&searchtext=sound
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=154509410&searchtext=sound
  https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=247854279&searchtext=sound
  
• https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=216217606&searchtext=sound
  
• This one is suggested by DK Jackass
  https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=108176967&searchtext=
  Last one is for all who can't use post processing properly
  suggested by: /Cy4G\ Inkling Boy
  https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=269958260

I hope you tried it already. probably not yet though so keep in-mind that i will still be updating this. you can contribute or at least tell me some grammar mistake or spelling and helpful addons that can make gmod realistic. if you want to see the collection of all the addons shown in this guide, here's the link: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=308718289

Plus: Some people still don't get it though but i think most of you may already know it,
some addons cannot be compatible with each other so please... don't blame me for something
"Wrong" in your Gmod. just use at least; few or more per section to prevent gmod from
crashing, error, problem and etc.... Thanks for Understanding.

also' if you want to improved or know more about the shadows on source engine. then you might wanna take a look at this Thread in Facepunch. Very helpful in making Picture or Films in Gmod
"http://facepunch.com/threads/1112981"
and also a video i re-uploaded tutorials about using the console on Shadows too.
https://www.youtube.com/watch?v=-twIWD02Gcg
Bye now :)