flats: improve RROCK17

I added cracks to the three big round rocks so that the tiling is less
obvious. The new bump map can be found here:
www.ciinet.org/kevin/myimages2/doom/freedoom/textures/Rockdispl3v4.png
This commit is contained in:
Kevin Caccamo 2017-07-12 09:59:45 -04:00
parent b6ef41cb9c
commit 555279839f

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