Messed up lighting on func_detail brushes??

I've started making a TF2 level and built some wooden stairs using func_detail brushes. I'm getting some bad lighting errors when I play in game. To start with, the lighting looks flat and kinda vertex-lit I guess, then when I start walking up the stairs the brightness of them changes randomly as I move. Like how the brightness of surfaces changes with HDR on.

The process I took to make the stairs was to make the whole set out of world brushes, apply/rotate/scale textures + nodraw on unseen surfaces, selected all the brushes that make up the staircase and made them into func_detail brushes. Lightmap resolution is set to 8.

Just started using Hammer a few days ago, I couldn't find anything from a quick google search...

[Blocked Image: http://img.photobucket.com/albums/v497/Slainchild/badlighting01.jpg]

[Blocked Image: http://img.photobucket.com/albums/v497/Slainchild/badlighting02.jpg]

[Blocked Image: http://img.photobucket.com/albums/v497/Slainchild/badlighting03.jpg]

Anyone know how to fix this?

Ok, thanks for the tip, didn't know TF2 doesn't use it well

However... I still have the same lighting problems without HDR.

Awesome, that was it. Thanks. Luckily there was a non-mesh version of that texture (though it will probably get changed anyway).