Vray Framebuffer offset when rendering two-point perspective

V-Ray V-Ray Common Public
1

Hello!

I know that the issue of renders coming out with some offsets from the Rhino viewport and Vray framebuffer has been reported. When would the fix be released?
Is there a temporary solution to this issue in the meantime?

Thank you :slight_smile:

2

The developers are still working on that.
Also unfortunately there is no workaround at this point.

3

Yes, don’t use 2 point perspective,instead use lens shift there is a script floating somewhere on this forum to guess the perfect vertical shift.
The script is called lens shift

4

Great I will look for it..!

5

here it is.

-_Runscript (
Call guess_shift()
Sub guess_shift()
    Dim view : view = rhino.CurrentView
    If Not rhino.IsViewPerspective(view) Then
        rhino.Print “can’t calculate vertical shift for orthogonal views”
        Exit Sub
    End If
    Dim cam : cam = rhino.ViewCameraTarget(view)(0)
    Dim tar : tar = rhino.ViewCameraTarget(view)(1)
    Dim cam_a : cam_a = cam
    Dim tar_a : tar_a = tar
    cam_a(2) = tar(2)
    tar_a(2) = cam(2)
    If rhino.Distance(cam, tar_a) = 0 Then Exit Sub

Dim shift:shift = rhino.Distance(cam, cam_a) / rhino.Distance(cam, tar_a)
    If cam(2) > tar(2) Then
        shift = -shift
    End If
    rhino.Print shift
End Sub
)

6

Thanks Renee.

So, I use this script while in perspective mode, right? Would my viewport be tweaked into a ‘fake’ two point perspective as well? Or just the render result will be in ‘fake’ two point?

7

yes use it while in perspective mode.No the viewport won’t change.

You have to write the result in the lens shift box in the camera setting,

8

Thanks. Very interesting to me. I wish I know scripting…!

9

I wish i could to :slight_smile: