Stand inside your own apartment at eye level and walk it before the renovation. Walls and furniture block you; doors and cabinets open.
From above every floor plan looks roomy. It gets tight when you stand in the gap between the bed and the wardrobe, or open the fridge and back into the table. The walkthrough puts you inside at eye level and lets you cover the place on foot, as at a viewing. You see what a plan hides, such as whether a column blocks the window, whether the TV is visible from the sofa, whether there is room to turn in the hallway.
The Walk button in the editor or in a 3D tour puts you inside.
The mouse turns your head, WASD moves you forward, back and sideways.
A hint by the crosshair says what will open: door, wardrobe, drawer.
The camera returns to the normal view; the project doesn't change.
The controls are familiar. WASD steps, the mouse looks, Shift runs and Space jumps. Walking speed is 1.9 m/s, a calm indoor pace, and running is nearly twice that. A hint with the keys stays at the bottom of the screen, and a mini-map in the corner shows where you stand and which way you face, which helps a lot on a large apartment or a whole floor.
You get to the next room only through a doorway. Furniture blocks you too, so you walk around the sofa, the table or the wardrobe, and if only 40 cm is left between the bed and the dresser you feel it at once. Rugs and anything under 30 cm can be stepped over. You can't leave the apartment either.
If you have to squeeze sideways through a gap, widen it now, while the furniture isn't ordered yet.
Walk up to an item and press E. Apartment doors, wardrobes, dressers, the fridge, oven, dishwasher and washer open, the TV switches on and the sofa bed unfolds. Reach is 2.4 m, so you can't open a wardrobe from across the living room and have to walk over. You also see whether an open door hits the next cabinet, or you.
In a house or a two-level apartment the staircase works as a sloped floor. You climb the flight and come out upstairs through the opening in the slab, no teleporting. A threshold or step up to 40 cm needs no jump. On the way you see whether the slab hangs too low over your head halfway up.
Cinematic mode changes how the camera behaves. Your view follows the mouse with a slight lag, steps get almost twice as slow, starts and stops ease in, and with Head bob on the camera sways with your steps. It is awkward for arranging furniture, but on a client call or in a recorded video the picture doesn't jerk. Cinematic mode switches itself off as soon as you edit the scene.
Walk between the bed and wardrobe you have in mind while you can still pick a different size.
Lead the client from the entrance and show what the view from the kitchen will be.
Walk a tour from the seller's website and think about what goes in each room.
Draw a floor plan or upload one from a photo and press Walk.
The Realism button adds soft shadows and a photographic tone while you work, and photo mode ray-traces the view into a picture for your client.
Open the fridge, pull out a drawer, close the curtains and switch on the TV right inside the 3D model of your apartment.
Send a link and your client walks through the apartment in the browser. The same tour goes on your website with one line of code.