I upgraded from Vegas 22 to 23.

The problem that I noticed:

In the preview, my video looks okay and every video effects are looking good.

But after rendering, the results are different.

Dark scenes come out much darker than in the actual preview, showing completely different results from what I saw there. However, in my case, the bright scenes look normal — it’s only the dark scenes that turn out so differently.

Sorry that I did not upload any images to compare, but long story short: the outcome is different than the preview(It seems it is only affecting darker scenes in my case..)