Gigantic hole in ENKB 1.40

[nubbix]

Hi Oscar

You previously made an custom Mesh file for +63+007 for me. I used this in X-Plane 11 and while it seems to worked porting these
into X-Plane 12 too. But when I today was trying to remake the tile using 1.40 and this custom .mesh file, I got an serious mesh error as shown in the image below.

Any idea why this happen. Only setting I changed was
apt_smoothing_pix from 8 to 32
terrain cast shadown to true
use decal on terrain to true
mask_zl from 14 to 15

Everything else was default .