I’ve added your original as first screenshot. Your file is rendered with DxO Standard preset and shows no vignetting.
The other two,
- the one (VC 1) with general Volume Deformation (VD) at 200
- and the third (VC 2) with combination of general VD at 125 + local VD (= the red grid),
both showed up with darkened corners (= the vignetting). And contrary to your statement “VP Fusion in DPL8 does not work with a RAW image…”, it does work.
However, I had to use the local VD very carefully (= not covering too much area with the red grid & not dragging the → “Diagonal” slider too far).
.
While this surprised me, it may be due to the intended (?) use of the local adjustments … and led me to use the local correction after / in combination with the general one.
Check for yourself what works for you. – I don’t know why the tool reacts this way.
.
for the problem with the Reshape Fusion: local Perspective
see → Viewpoint 5 crashes - #23 by Wolfgang