TF2 skybox problems

[Mataata]

Every time I compile a map, I get this error with the skybox:

[quote]
*** Error: Skybox vtf files for skybox/sky_well_01 weren't compiled with the same size texture and/or same flags!
Can't load skybox file skybox/sky_well_01 to build the default cubemap!
*** Error: Skybox vtf files for skybox/sky_well_01 weren't compiled with the same size texture and/or same flags!
Can't load skybox file skybox/sky_well_01 to build the default cubemap!
[/quote]

After some messing around, I've found out that, no matter what skybox I use, I always get this error(although with the skybox's name instead of sky_well_01). I've even tried re-compiling maps that used to not have this error, but I get the same thing. (a map I have made before used sky_trainyard_01)

In-game, there seems to be nothing wrong with the skybox itself; however I can't generate cubemaps because of a console error that I get that gives me a similar message.

Can someone help me with this? It's really annoying.

[Firegod522]

add _hdr to the name if you haven't.

And you have to have env_cubemap entities around the map when you build the cubemaps. That error just keeps the map from using default skybox cubemaps. It saves performance when they aren't all the same size.