Glass roofs are color swatches?

I thought they meant that there be different design swatches. In the first trailer at 0:52 you can see hexagon shapes on the glass. Like in GT, some of the medium size glass doors have different design swatches in the color swatch options. I'm sure light will go through, its the very purpose of a greenhouse, light also go through windows and the glass dance floor from GT as well.
Edit: Someone who played answered on reddit that light does go through the glass roof.
https://www.reddit.com/r/thesims/comments/8pwkfw/played_the_sims_4_seasons_today/e0fmaqc/