Do I need to add rooms on Level 0 to see the floor on Level 1?

[gandsnut]

Hello: On my first few SH3D plans, my 2-level structure showed a floor between level 0 and level 1.

Somehow in my current plan, I have 2 levels but the floor is invisible when seen in 3D render window.

Have I missed something?
Thx.

[okh]

Hi, did you create a room on your second level (double-click with room tool - Create rooms - within a closed set of walls, or draw with room tool along the walls)?

ok