In the attached IDF file, for window Zn001:Wall001:Win001, I defined a outside reveal of 0.2 m. So that the Y coordinate of the window surface (0.2m) is different from its base surface (0.0m). However, when I import it using the Sketchup Plug in, I get the following warning message:
Warning: Zn001:Wall001:Win001
This sub surface was not in the same plane as its base surface.
It has been automatically fixed.
Then I export the IDF file from the Sketchup plugin, the Y coordinate of the fenestration surface becomes 0.0m, which is same as the wall surface, which means the reveal definition was lost for the window.
I am attaching the link to the IDF file here since I can not upload attachment:
https://gist.github.com/TiejunWu/fc4c8a03bdda04541d7f/raw/19908948eba4eebb7ddf966625e552382a889318/Window_Reveal.IDF