Everything is a missing texture, Do you need any games for this?

Thank you for information, one guy said same thing but then "nevermind" so I don't know maybe reinstall. I have no idea. I know it's a common problem about textures but literally I was working in basic Hammer with Garrys Mod assets. Map works fine for me and also my friend so now I dont know

jesus crist!! all reflections is missing texture!! i will try to reinstall it...mabye that fixes it?

i reinstalled the map and even restarted the whole game but the missing reflections still remain!! sorry man but your map needs fixing!

引用自 -\_Technotastic_/-：

i reinstalled the map and even restarted the whole game but the missing reflections still remain!! sorry man but your map needs fixing!

use mat_specular 0

Thank you for comments and thank you for telling about mat_specular 0
You should use mat_specular 0, I use it for fps but I see the map need it anyways.

missing textures sometimes happen because of some addons that are not compatible

1) rename icon from "gm_justcity-thumbnail-v1-128" to "gm_justcity.png" so we can see it
2) i dont wanna use "mat_specular 0" i wanna see reflections in my ♥♥♥♥♥♥♥ crossbowww!!! make cubemaps using "buildcubemaps" (in my super mega nasral ♥♥♥♥ maps i do cubemaps like in this guide) https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=861820969 and i also tried in your gm_justwalls and so yessss https://steamuserimages-a.akamaihd.net/ugc/1825655059824229914/3763F370F261AF9EA6DD13CC01CD720BED2F23F8/

引用自 valentine：

1) rename icon from "gm_justcity-thumbnail-v1-128" to "gm_justcity.png" so we can see it
2) i dont wanna use "mat_specular 0" i wanna see reflections in my ♥♥♥♥♥♥♥ crossbowww!!! make cubemaps using "buildcubemaps" (in my super mega nasral ♥♥♥♥ maps i do cubemaps like in this guide) https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=861820969 and i also tried in your gm_justwalls and so yessss https://steamuserimages-a.akamaihd.net/ugc/1825655059824229914/3763F370F261AF9EA6DD13CC01CD720BED2F23F8/

Okay interesting, thank you for help. Im going to fix cubemaps, on your screenshot it looks very nice. Look, where do I place env_cubemap because now a one entity is above spawn area. Is that okay? It doesnt work right now but do I place just one?

You've got some strange lighting artifacts on a lot of surfaces
Make sure you're not compiling in fast mode, as that can cause weird issues like this.
https://i.imgur.com/EE4yeZD.png

There's a prop in the skybox that's casting a huge shadow on the ground, disable shadows on skybox props, it'll even help bring compile times down.
https://i.imgur.com/Liex6JI.png

And turning random brushes into func_details while leaving out other parts fools hammer into thinking the inside faces should be drawn, this will kill performance and extend your compile times.
https://i.imgur.com/RL5Jkb8.png

I hope these pointers are of good help to you and I wish you luck in your future endeavors.

Here are some links with more info and documentation to learn from.
https://www.interlopers.net/tutorials/
https://developer.valvesoftware.com/wiki/Main_Page

it is so bright that i think it's because of my addons.
but i'm not sure, is it because of my addons or is it something else? please look into this, thank you. (sorry for bad grammar)

There are pink checkerboard textures on the pipes in the secret room with the elevator and teleporter.

Thank you for reporting, though I don't know what is causing the problem. I hope it dont happen very often.