Viewport

The Viewport panel is a graphical user interface which displays a interactive representation of a 3D scene. It provides ability to preview and interact with the 3D scenes for a wide range of tasks such as viewing, manipulating and modifying the objects.

The Viewport panel consists of the following elements:

Number	Description
1	Viewport menu-bar
2	Display parameters quick menu
3	Switch camera and render delegate
4	Edit Target (Layer)
5	Current Camera’s name

Managing the View

Navigation

The navigation is performed relatively to the view center using the following hotkeys:

Shortcut	Action
LMB	Select
Alt + LMB(Hold)	Orbit/Rotate view
Alt + MMB (Hold)	Pan/Slide view
Alt + RMB (Hold)	Dolly (Zooming)
RMB (Click)	Context Menu
F	Center camera on the selection

Context Menu

Right-clicking (RMB) on a prim in the viewport provides access to a range of actions:

• Hide: Conceals the prim from view.

• Deactivate: Non-destructively removes prim from the scene.

• Switch Prim Variant: Allows switching between different versions of the prim, if defined.

Prim Variants

This section of the context menu displays available variants for the selected prim:

Material Assignment

The RMB context menu also enables material assignment:

• Assign Material: While materials are selected in the Outliner panel, they can be assigned to the Prim using Assign material option. All selected materials will be listed in this menu.

• Drag-and-Drop: Alternatively, you can assign a material by dragging and dropping it from the Outliner panel onto the prim in the Viewport using the middle mouse button (MMB). This action is equivalent to using the “Assign Material” option.

Menu-bar

View

Item	Description
Look Through Selected	Use the selected object as camera for positioning: Switch back to the Def Cam to move the view without affecting any objects.
Select Camera	Select current camera object.
Create Camera From View	Create a new Camera using current view position
Shading Mode	Allows to select Viewport shading mode: Points - displays only vertices of the objects. Wireframe - displays only edges (wireframes) of the objects. Wireframe on Surface - displays edges (wireframes) over the surface of the objects. Shaded Smooth - displays objects using smoothed shadows and the base colors. Shaded Flat - displays objects using flat colors.
Color Management	Allows to select which color space to use for Viewport: Disabled - disables color management, meaning the software will not apply any color space conversions or transformations. sRGB - sRGB color space, ensures your Viewport shows accurate colors. OpenColorIO - see OCIO section.
Hydra Renderer	Allows for selecting from the list of accessible Hydra renderers.
Render Settings	See Viewport Render Properties
Display Purpose	Allows for managing the display_purpose parameter.
Pause Render	Pauses IPR rendering.
Resume Render	Resumes IPR rendering.
Restart Render	Resets Viewport renderer.
Enable Scene Materials	Whether to display Materials.
Cull Backfaces	Use backface culling to hide backsides of faces.
Camera	Allows for switching between the available cameras. The current view can be changed selecting one of the existing cameras using Camera Select menu or menu-bar View>Camera): Moving the view will modify the position of the selected camera. Switch back to the Def Cam to move the view without affecting any objects.

Lights

Item	Description
Use Default Lighting	Enables a default lighting setup. A simple directional light, for basic scene illumination.
Use All Lights	Enables all lights defined in your scene.
Enable Shadows	Activates shadow casting for all lights.

Show

Item	Description
Show All	Displays all objects in the Viewport, including meshes, curves, cameras, lights, and other elements.
Common Mesh Basis Curves Camera Lights	Whether to display or hide a specific set of common objects in the Viewport.
Isolate Selection	Hides all objects in the scene except for the currently selected object(s).

Top-bar menu

Item	Description
1	Select Camera
2	Gamma
3	Exposure
4	Color Space
5	Displayed AOV
6	Shading Mode selection
7	Enable Scene Materials
8	Lights options
9	Isolate Selection
10	Render Region Tool

Render Region

The Render Region allows you to render a specific portion of your scene at full resolution. This is useful in high-load scenes for efficiently making adjustments to specific areas of interest.

This will render only the selected area at full resolution, allowing you to quickly preview and refine your work.

Viewport preferences

The functions listed in the Windows>Preferences>Viewport menu in the top-bar allow to configure Viewport’s selection and background colors, grid size, default render delegate, overlay preferences etc.

Viewport Render Properties

The Viewport display properties can be configured using the Render Settings improved UI (View>Render Settings). This menu includes the Hydra renderer attributes presented in the current scene. The numeric attributes can be configured using the Ladder Widget

OCIO

The Hydra Viewport allows to manage the color preferences using the OpenColorIO library. It allows to have the consistent results in the multiple applications.

The OCIO configuration can be modified using OCIO var or using the Preferences menu.