See? not that hard- also more likely to get an answer...

I'd say it's not confirmed that it's a Pay-for DLC.
Even if it was we have no info on how much, and in any case it's always optional.

The quality of the man's work is really high, so if it was in the range of 5$-9$ I'd be happy to actually buy it.

Plus as anyone else noticed, it's just textures so not having them it's largely a non-issue.

If it was a 3D-rework of the map it'd be a different topic.
Cheers,
stay positive.

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Para_Bellum

"It takes forever +/- 2 weeks for the A-10 to get anywhere significant..."
Ice

"Ha! If it gets him on the deck its a start!"
MigBuster

"What people like and what critics praise are rarely the same thing. 'Critic' is just another one of those unnecessary, overpaid, parasitic jobs that the human race has churned out so that clever slackers won't have to actually get a real job and possibly soil their hands."
Sauron