Preview is accurate, but export / render is overexposed / too bright when there's a layer on top I'm editing a small video and have already added several Text strips into an above layer. The problem is that now for some reason, the moment my render hits a place where there's text on the video, the brightness goes way up. Here is a small little video to explain the problem.

I know that the variables are unreadable on the video, so I added detailed screenshots to this post.





Thanks for your help!
A couple things occur to me:


Your Materials. I noticed your materials in the second screenshot. Why use an Emit value instead of cranking up the Intensity and checking Shading > Shadeless? This could bleed over and cause the brightening.
Text in the VSE. Is your text animated? Does it move or change? If it doesn't, you should really consider using Text strips instead of Scene strips. To add a Text strip, key Shift + A, then mouse over to Effect Strip > Text. In the VSE's Properties panel (key N to toggle open/close) make sure Edit Strip > Alpha Over is selected in the Blend: drop down menu. This will make sure that only the text is displaying. Lastly, go to VSE Properties panel > Effect Strip > Text: and enter your text.