i want to create a room for my game, a room’s view from inside without using gamedraw. how to do this?
You either need to use primitives to construct a basic mock up or you need to build the assets using a 3d modelling package. Blender is free and integrates well with Unity. You may well also be able to reuse assets from tutorial projects or find some free ones on the Asset Store. There are a number of room construction kits and extra primitives on the Asset Store. Look under environments in the 3d models section.