The map is reflected in the sky

[safe idol]

No such variable "$basetexture" for material "skybox/paintedrt"
Can't load skybox file skybox/painted to build the default cubemap!
No such variable "$basetexture" for material "skybox/paintedrt"
Can't load skybox file skybox/painted to build the default cubemap!

[cloud drift]

did you create as it says how to here https://developer.valvesoftware.com/wiki/Env_skypaint