Description of the feature
In portal 1 often times you see the underneath platforms show small areas of the BTS
mockup how how it would look with partial tiles. I do not think this functionality is in the compiler

note that only black tiles will change white ones will stay the same for partial tiles like the half wall black will change but not the white.
Why should this be implemented
I think it would make the p1 style look better and it will give slightly more wall variety.


Additional information
I know this is style mixing but it's apart of the p1 style to not include it would be odd to not include.
also I would make that argument for overgrown also but the bts areas of that style are far more complicated than just change a texture and make the pistons connect.