[nDisplay] Bad render, how remove ?

Hi,
I try to use nDisplay on a cave but the result isn’t perfect. We can see black gradient on each side of viewport. Maybe it’s postprocess effect, but I try to remove all postprocess effect and the result is the same…

On screenshot, we are 2 viewports per window (2 window). One window at top, other at bottom. One viewport at left, other at right.
Offsets are corrects.



# NODES
[cluster_node] id=master_up addr=127.0.0.1 window=wnd_up eye_swap=false sound=true  master=true port_cs=41001 port_ss=41002 port_ce=41003
[cluster_node] id=master_dn addr=127.0.0.1 window=wnd_dn

# WINDOWS
[window] id=wnd_up fullscreen=false WinX=0 WinY=0 ResX=1920 ResY=540 viewports="vp1_up,vp2_up"
[window] id=wnd_dn fullscreen=false WinX=0 WinY=540 ResX=1920 ResY=540 viewports="vp1_dn,vp2_dn"

# VIEWPORTS
[viewport] id=vp1_up screen=scr1_up x=0  y=0  width=640 height=540
[viewport] id=vp2_up screen=scr2_up x=640  y=0  width=640 height=540

[viewport] id=vp1_dn screen=scr1_dn x=0  y=0  width=640 height=540
[viewport] id=vp2_dn screen=scr2_dn x=640  y=0  width=640 height=540

# SCREENS
[screen] id=scr1_up loc="X=1,Y=-0.3975,Z=" rot="P=0,Y=0,R=0" size="X=0.3975,Y=0.31466" parent=center_screen
[screen] id=scr2_up loc="X=1,Y=0,Z=0" rot="P=0,Y=0,R=0" size="X=0.3975,Y=0.31466" parent=center_screen

[screen] id=scr1_dn loc="X=1,Y=-0.3975,Z=-0.31466" rot="P=0,Y=0,R=0" size="X=0.3975,Y=0.31466" parent=center_screen
[screen] id=scr2_dn loc="X=1,Y=0,Z=-0.31466" rot="P=0,Y=0,R=0" size="X=0.3975,Y=0.31466" parent=center_screen


I create empty project to test, I add a white wall, the DisplayClusterSetting, modify gamemode, but nothing else.
Do you have any idea ?

Stevens