Using Shift Matrix, appears to invert the sign in the matrix height values.
sync on
` set a slow sync rate so we can see what's going on
sync rate 5
make matrix 1,1000,1000,20,20
position camera 500,250,-100 : point camera 500,0,500
` make a hole in matrix
for z = 5 to 10
for x = 5 to 10
set matrix height 1,x,z,-150
next x
next z
update matrix 1
do
shift matrix up 1
` shift matrix down 1
` shift matrix left 1
` shift matrix right 1
update matrix 1
sync
loop
Was this problem known before Patch 4?
Programming anything is an art, and you can't rush art.
Unless your name is Bob Ross, then you can do it in thirty minutes.