TF2 uses what are known as cubemaps to create reflections. Basically they're 6-sided pictures of the world around them that are stored in the BSP file and will appear in nearby reflective surfaces.
The Hammer compile tools will not take the cubemap screenshots of your map automatically- that has to be
triggered manually in-game. To make up for this, VBSP attempts to make a default cubemap out of your selected 2D skybox. But for some reason, this will not work with any TF2 skyboxes, resulting in the error you posted above. Luckily, this is far from a fatal error. The worst effect it has is seeing a purple-and-black checkerboard in all reflective surfaces, and this can be easily fixed by following the steps I linked to above.
As per your VVIS and VRAD issues,
this is what Startracker is referring to. Installing it fixes a problem that many users started experiencing concerning .DLL files and their compile tools.
If that does not fix your problem, please post your full compile log.
Well here's the compile log just in case, but I'm pretty sure that I've already explained all the errors according to what I've read on the compile log:
** Executing...
** Command: "C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\bin\vbsp.exe"
** Parameters: -game "C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf" "C:\Users\Lucio\Downloads\arena_pitful22.vmf"
Valve Software - vbsp.exe (Aug 2 2018)
6 threads
materialPath: C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf\materials
Loading C:\Users\Lucio\Downloads\arena_pitful22.vmf
Patching WVT material: maps/arena_pitful22/dev/dev_blendmeasure_wvt_patch
Patching WVT material: maps/arena_pitful22/dev/dev_blendmeasure2_wvt_patch
fixing up env_cubemap materials on brush sides...
ProcessBlock_Thread: 0...1...2...3...4...5...6...7...8...9...10 (0)
ProcessBlock_Thread: 0...1...2...3...4...5...6...7...8...9...10 (0)
Processing areas...done (0)
Building Faces...done (0)
Chop Details...done (0)
Find Visible Detail Sides...done (0)
Merging details...done (0)
FixTjuncs...
PruneNodes...
WriteBSP...
done (0)
writing C:\Users\Lucio\Downloads\arena_pitful22.prt...Building visibility clusters...
done (1)
*** 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!
Finding displacement neighbors...
Finding lightmap sample positions...
Displacement Alpha : 0...1...2...3...4...5...6...7...8...9...10
Building Physics collision data...
done (0) (180607 bytes)
Placing detail props : 0...1...2...3...4...5...6...7...8...9...10
Compacting texture/material tables...
Reduced 1920 texinfos to 1302
Reduced 23 texdatas to 20 (599 bytes to 534)
Writing C:\Users\Lucio\Downloads\arena_pitful22.bsp
Wrote ZIP buffer, estimated size 954, actual size 740
2 seconds elapsed
** Executing...
** Command: "C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\bin\vvis.exe"
** Parameters: -game "C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf" "C:\Users\Lucio\Downloads\arena_pitful22"
vvis launcher error: can't load vvis_dll.dll
The specified procedure could not be found.
** Executing...
** Command: "C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\bin\vrad.exe"
** Parameters: -game "C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf" "C:\Users\Lucio\Downloads\arena_pitful22"
vrad_launcher error: can't load vrad_dll.dll
The specified procedure could not be found.
** Executing...
** Command: Copy File
** Parameters: "C:\Users\Lucio\Downloads\arena_pitful22.bsp" "C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf\maps\arena_pitful22.bsp"
Also mind giving me a link to the Microsoft C++ redistribute* thing? I just want to make sure I'm getting the right one and such.