BuildVolumeMesh issue

[_Aka_]

I think you can solve it doing the following:
listening on the OnRefresh event, in it update the UV offset then call yourGenerator.Refresh(). That way the UVs are updated before the next frame rendering

That is what I'm doing:

Code:

var bvm = gen.GetModule<BuildVolumeMesh>( "Track Vol Mesh", true );
bvm.SetMaterial( 0, material );
bvm.MaterialSetttings[ 0 ].KeepAspect = CGKeepAspectMode.ScaleV;
var cm = gen.GetModule<CreateMesh>( "Track Create Mesh", true );
cm.OnRefresh.AddListenerOnce( _ => {
    var prevSeg = seg.Spline.GetPreviousControlPoint( seg );
    float savedForNextSegUVOffsetY;
    if (prevSeg == null) { 
        savedForNextSegUVOffsetY = bvm.MaterialSetttings[ 0 ].UVOffset.y + bvm.groupsByMatID[ 0 ].AspectCorrectionV;
    }
    else {
        savedForNextSegUVOffsetY = prevSeg.EndBias + bvm.groupsByMatID[ 0 ].AspectCorrectionV; // EndBias will hold the accumulated Offset to the end of it's segment
        if (prevSeg.GetMetadata<TrackMetadata>().Geo.materialName == geo.materialName
         && Math.Abs( bvm.MaterialSetttings[ 0 ].UVOffset.y - prevSeg.EndBias ) > 0.001f) {
            bvm.MaterialSetttings[ 0 ].UVOffset.y = prevSeg.EndBias;
        }
    }
    if (Math.Abs( savedForNextSegUVOffsetY - seg.EndBias ) > 0.001f) {
        seg.EndBias = savedForNextSegUVOffsetY;
    }
    gen.AutoRefresh = true;
} );
gen.Refresh( true );

 
Where does this code belong?
Have you tried calling gen.Refresh inside the event listener, in place of gen.AutoRefresh = true? I advise to listen on the OnRefresh event of the generator and not the module, so that you don't trigger a Refresh operation in the middle of the execution of a previous Refresh. When the generator's OnRefresh is called, you know that the refreshing is over.