A few days ago I updated C4D 2026.0.0 to 2026.3.3. Since then my vfb got shrunk to about two thirds of the surrounding window (it sits in the upper left corner), no matter if I use it in full sreen mode or scale it down. This happens with two different V-Ray 7 installations while V-Ray 6 behaves normal.
I use two identical 4K Monitors at 3840 x 2160 and a Windows screen scaling of 150 %, which might be the reason for the issue. But changing it to 100 % doesn’t fix the downscaling and results in some further issues regarding the spacing of the text fields inside the vfb.
@deyan.hadzhiev mentioned in this post that you “changed / upgraded some of our UI frameworks under the hood for V-Ray 7”. Could this be the reason?
Any help would be highly appreciated.
Hi @greymiura , we also noticed that the update to Cinema 4D 2026.3 introduced a problem with how the layout scaling for the V-Ray VFB is calculated. We had an internal issue that was seemingly fixed, at least not longer reproducible (4K monitor with 150% scaling). You mentioned that you updated Cinema 4D, but did you update V-Ray for Cinema 4D to its latest version (v7.40.00) which should include a fix for this issue? If not, can you please try updating to see if the issue will persist? And if it persists, can you send a screenshot of the UI?
Thank your very much @deyan.hadzhiev for your kind reply! Your’re right V-Ray 7.40.00 fixes the issue.
Unfortunately, the problem still persists with C4D 2025 & V-Ray 7.1, which is my current working environment for commercial projects. But I think there won’t be an easy fix for this, will it?
It is interesting how your Cinema 4D 2026 update affected the older Cinema 4D 2025.
I will try to backport the fix to the older 7.1 stable builds, please check them in the next few days here.
It is interesting how your Cinema 4D 2026 update affected the older Cinema 4D 2025.
Indeed 
Many thanks again, @deyan.hadzhiev , I very much appreciate this!
Best regards & have a nice weekend!
