hammer should save the compile log to a text document with the same name as your vmf, in the same location as your vmf is stored. If you have ABS' mapping resource pack it'll be in 'Team Fortress 2 > sourcesdk_content > tf > mapsrc.
Thanks for that. Here is the log:
materialPath: C:\Program Files\Steam\steamapps\common\team fortress 2\tf\materials
Loading C:\Users\John\Documents\Warehouse test.vmf
Patching WVT material: maps/warehouse test/construction/concrete/concreteblendground003_wvt_patch
fixing up env_cubemap materials on brush sides...
0...1...2...3...4...5...6...7...8...9...100...1...2...3...4...5...6...7...8...9...10Processing areas...done (0)
Building Faces...done (0)
Chop Details...done (0)
Find Visible Detail Sides...
Merged 504 detail faces...done (0)
Merging details...done (0)
FixTjuncs...
PruneNodes...
WriteBSP...
done (1)
writing C:\Users\John\Documents\Warehouse test.prt...Building visibility clusters...
done (0)
*** Error: Skybox vtf files for skybox/sky_alpinestorm_01 weren't compiled with the same size texture and/or same flags!
Can't load skybox file skybox/sky_alpinestorm_01 to build the default cubemap!
*** Error: Skybox vtf files for skybox/sky_alpinestorm_01 weren't compiled with the same size texture and/or same flags!
Can't load skybox file skybox/sky_alpinestorm_01 to build the default cubemap!
Finding displacement neighbors...
Found a displacement edge abutting multiple other edges.
Warning: invalid neighbor connection on displacement near (723.00 797.00 -1532.50)
Warning: invalid neighbor connection on displacement near (723.00 797.00 -1532.50)
Warning: invalid neighbor connection on displacement near (723.00 3997.00 -1532.50)
Warning: invalid neighbor connection on displacement near (723.00 2692.00 -1532.50)
Warning: invalid neighbor connection on displacement near (98.00 797.00 -1516.00)
Warning: invalid neighbor connection on displacement near (98.00 3997.00 -1516.00)
Warning: invalid neighbor connection on displacement near (723.00 797.00 -1516.00)
Warning: invalid neighbor connection on displacement near (723.00 797.00 -1516.00)
Finding lightmap sample positions...
Displacement Alpha : 0...1...2...3...4...5...6...7...8...9...10
Building Physics collision data...
qhull precision error: Only 4 facets remain. Can not merge another
pair. The convexity constraints may be too strong. Reduce the
magnitude of 'Cn' or increase the magnitude of 'An'. For example,
try 'C-0.001' instead of 'C-0.1' or 'A-0.999' instead of 'A-0.9'.
.
2 threads
reading c:\users\john\documents\Warehouse test.bsp
reading c:\users\john\documents\Warehouse test.prt
775 portalclusters
2875 numportals
0...1...2...3...4...5...6...7...8...9...100...1...2...3..8.4......59..