Once a solid is built, the next step is to turn it and look at its other sides. The command to rotate the 3D view in AutoCAD is 3DORBIT, but experienced users rarely type it; they hold Shift and drag with the mouse wheel. Wireframe models are hard to read once rotated, so the next step is a shaded visual style with VSCURRENT.
This article measures how each drag changes the view by reading the VIEWDIR variable (the viewing direction) before and after, in AutoCAD 2027. The ten visual-style images are real screenshots. For 3D modelling taught properly, the Institute runs an AutoCAD course for construction.
Starting an orbit
| Route | Type or press |
|---|---|
| The 3dorbit command | Type 3DO or ORBIT |
| Quick orbit, no command | Hold Shift and the mouse wheel, drag |
| Menu | View → Orbit → Constrained Orbit |
| Free orbit | 3DFORBIT, menu View → Orbit → Free Orbit |
Locations and aliases come from the 2027 acad.cuix and acad.pgp files. While 3DORBIT is running you cannot edit objects; press Esc or Enter to leave it.
What horizontal and vertical drags do
The model is a box and a cylinder, starting from the south-west view (-VIEW → _SWISO), VIEWDIR = (−1, −1, 1). Start 3DORBIT, hold the left button and drag horizontally 150 pixels.
| VIEWDIR | Azimuth | Elevation | |
|---|---|---|---|
| Before | (−1, −1, 1) | 225° | 35.3° |
| After the horizontal drag | (−5359, 2161, 4086) | 158° | 35.3°, unchanged |
A horizontal drag only turns the model about the vertical axis: the viewing direction goes round, the eye height stays. The Autodesk documentation on 3DORBIT says exactly this: "If you drag the cursor horizontally, the camera moves parallel to the XY plane of the world coordinate system (WCS)."
Back to south-west, this time hold Shift and the wheel and drag vertically down 120 pixels, with no command at all.
| VIEWDIR | Azimuth | Elevation | |
|---|---|---|---|
| Before | (−1, −1, 1) | 225° | 35.3° |
| After the vertical drag | (−102, −102, 7076) | 225°, unchanged | 88.8° |
A vertical drag only raises or lowers the eye: from 35° to nearly 89°, almost straight down, while the direction around the vertical axis stays put. Release the button and it is over; no command is left running.
Knowing the two movements makes orbiting predictable: drag across to walk around the building, drag up or down to look from higher or lower.
Reading VIEWDIR
VIEWDIR is a vector pointing from the target towards the eye. Only its direction matters: (−1, −1, 1) and (−5359, 2161, 4086) are both directions of different lengths. From x, y and z you get two angles:
| Angle | How | Example (−1, −1, 1) |
|---|---|---|
| Azimuth, around the vertical | the angle of (x, y) in plan | 225°, south-west |
| Elevation, above horizontal | arctan(z / √(x² + y²)) | 35.3° |
After the horizontal drag, x and y change but the ratio of z to √(x² + y²) does not: 4086 / 5778 and 1 / 1.414 both give 35.3°. After the Shift drag, x and y stay equal (−102, −102), so the azimuth stays 225°, while z jumps to 7076. Reading VIEWDIR is the surest way to know where you are looking from when the model is busy and the ViewCube is hidden.
Lost? Back to a standard view
After a few orbits it is easy to get lost. The fastest cure is -VIEW with a preset:
| Type | VIEWDIR | Looking from |
|---|---|---|
-VIEW → _TOP | (0, 0, 1) | Straight down, plan |
-VIEW → _SWISO | (−1, −1, 1) | South-west, above |
-VIEW → _NEISO | (1, 1, 1) | North-east, above |
After the horizontal drag above, -VIEW → _SWISO returned VIEWDIR to exactly (−1, −1, 1). The ViewCube does the same with the mouse; if it is hidden or keeps disappearing, see turning off the ViewCube.
Visual styles with VSCURRENT
Type VS and the 2027 release asks the question below.
Enter an option [2dwireframe/Wireframe/Hidden/Realistic/Conceptual/Shaded/shaded with Edges/shades of Gray/SKetchy/X-ray/Other] <2dwireframe>:Ten options, ten ways of seeing the same model, as in the image above.
| Type | Style | What it looks like |
|---|---|---|
2 | 2D Wireframe | Wireframe with hidden edges visible; the default for 2D |
W | Wireframe | 3D wireframe |
H | Hidden | Wireframe with hidden edges removed |
R | Realistic | Grey shading |
C | Conceptual | Warm and cool tones, faces easy to tell apart |
S | Shaded | Shaded, no edges |
E | Shaded with Edges | Shaded, with edges |
G | Shades of Gray | Grey tones |
SK | Sketchy | Hand-drawn look |
X | X-ray | Semi-transparent, hidden parts visible |
To check a solid with an internal hole, as in holes in 3D solids, X-ray shows the hole without cutting the solid.
Looking at the ten screenshots side by side suggests a simple division of labour. The two wireframe styles show every edge, including the hidden base circle of the cylinder, which is useful when snapping to edges at the back but confusing for reading the shape. Hidden and Sketchy remove the back edges, so the outline reads like a line drawing. Realistic, Shaded, Shaded with Edges and Shades of Gray all shade the faces in grey, with or without edges drawn. Conceptual is the one whose faces are easiest to tell apart, because it uses warm and cool tones rather than grey, which is why it is a good default for checking a model. Among the styles that fill the faces, X-ray is the only one in which the base of the cylinder still shows through the box, so it combines a readable solid with a view of what lies behind.
HIDE: hidden lines while staying in 2D Wireframe
HIDE, alias HI, hides the obscured edges without changing the visual style. In 2D Wireframe type HI: the cylinder's base circle, hidden by the box, disappears. The result is not identical to the Hidden style, though. The curved side of the cylinder is drawn as many triangular facets, with diagonals running up the shaft, whereas the Hidden style draws a smooth shaft with just two outline edges. HIDE suits a quick check of which solid hides which; for a clean picture, use the Hidden visual style.
A worked order for checking a model
-VIEW→_SWISOto start from the standard view, (−1, −1, 1).VS,Cfor Conceptual shading, so faces are easy to tell apart.- Hold Shift and the wheel, drag across to walk round all four sides.
- Drag down to look from above and check solids sit where the plan says.
- To see inside, switch to
VS,X(X-ray). - When done,
-VIEW→_TOPandVS,2to return to the 2D plan.
| Job | Quickest way |
|---|---|
| Walk round the building | Shift + wheel, drag across |
| Look from above | Shift + wheel, drag down |
| Back to the standard view | -VIEW → _SWISO |
| Back to plan | -VIEW → _TOP |
| Shade to read the shape | VS → C |
| Look inside | VS → X |
With this habit you almost never type 3DORBIT: Shift and the wheel do all the turning, and -VIEW does the returning. The measurements above also explain why the habit works. A horizontal drag never changes the elevation, so walking round the model cannot tip it over; a vertical drag never changes the azimuth, so looking from above keeps the same side of the building facing you. Keeping the two movements separate is what stops a model from ending up upside down on the screen.
The same numbers help when you need to describe a view to someone else. Saying "azimuth 225°, elevation 35°" or quoting VIEWDIR (−1, −1, 1) identifies the south-west isometric exactly, whereas "the view from the corner" does not.
Three things often repeated that are not true
| Often repeated | What holds on the 2027 release |
|---|---|
| You must type 3DORBIT to rotate | Shift and the mouse wheel, dragged, rotates with no command |
| A horizontal drag also tilts the view | A horizontal drag keeps the 35.3° elevation |
| Once lost, you have to orbit back | -VIEW → _SWISO returns exactly to (−1, −1, 1) |
Frequently asked questions
How do I rotate the 3D view in AutoCAD?
3DORBIT, alias 3DO. Or with no command: hold Shift and the mouse wheel and drag.
How do I orbit without flipping the model?
Drag across to go round, drag up or down to change height. One movement at a time is easier to control.
I am lost in 3D. How do I get back?
Type -VIEW and choose _SWISO for the south-west view or _TOP for plan.
How do I switch to a shaded view?
VS, then C (Conceptual) or R (Realistic). Back to 2D with VS, 2.
Can I see inside a solid?
Use the X-ray style: VS, X. Faces turn semi-transparent and edges behind them show through.
Does the visual style affect plotting?
It can: shaded viewports plot as raster images; see how to plot in AutoCAD.