Orthographic Cameras in Unreal Engine: A Guide to Architectural Views

Orthographic cameras are useful for architectural views and isometric presentations because they show a scene without perspective convergence. Unreal Engine’s official documentation says this projection can be used with features such as Lumen, Nanite, Virtual Shadow Maps, Temporal Super Resolution, reflections, volumetric effects, and Path Tracer [1]. This guide covers setting up the camera and adjusting the view, while distinguishing the version scope of the different documents.

1. Add an orthographic camera to the scene

1. Place a Camera actor in the level.

2. Select the camera in the Level Editor Outliner.

3. In the Details panel, follow Camera Settings › Projection Mode and select Orthographic.

4. Adjust the camera’s position and rotation under Actor Transforms in the Details panel.

This setting switches the selected Camera actor’s view to orthographic projection. According to the source documentation, Cine Cameras do not offer an orthographic view option, so you need to use a standard Camera actor for this setup [1]. For an architectural presentation that calls for a top, front, or side view, you can use the camera’s position and rotation to choose which direction the scene is viewed from.

2. Adjust framing and clipping planes

Ortho Width sets the width of the orthographic view in world units. A higher value shows more of the scene. The source does not provide a fixed recommended value for a particular architectural scene, so adjust it to suit the framing. You can set the image’s aspect ratio with the Aspect Ratio setting or choose one of the listed presets [1].

When automatic calculation is on, the engine evaluates the near plane based on the camera angle and the ground surface. In small scenes, an excessively distant far plane can affect depth precision; the official documentation notes that as the scene gets smaller, the far plane should also be shorter to preserve depth precision [1]. If you turn off automatic calculation, you can enter the near and far planes manually. Update Ortho Planes updates the planes and view origin to help prevent clipping and lighting artifacts.

3. Adjust the view in the viewport

Adjusting the camera and navigating the editor viewport are separate operations. According to the Unreal Engine 4.27 viewport documentation, in the orthographic Top, Front, and Side views, dragging with the left mouse button creates a selection box, while dragging with the right mouse button pans the view. Holding both the left and right mouse buttons while dragging zooms in and out [2]. Press F to focus on a selected actor.

The same documentation explains that Alt + LMB rotates the view around a focal point, Alt + RMB moves the camera toward or away from that point, and Alt + MMB pans the view horizontally and vertically. However, the standard orthographic viewport controls are not the same as the WASD movement controls in perspective view; WASD controls are defined for the perspective viewport [2]. So, focusing on a scene element with F and then panning in the orthographic view with the right mouse button can be a practical navigation sequence.

4. Considerations for architectural visualization workflows

Orthographic cameras can be used for architectural and production visuals where perspective is not desired. The Unreal Engine 5.3 release notes also say that this projection is commonly used in architecture and production visualization, and that support for modern features such as Lumen, Nanite, and shadows was improved in that release. However, orthographic rendering is still marked as experimental in the 5.3 notes [3]. The current camera documentation lists orthographic cameras as compatible with various engine features [1]; compatibility should still be verified for the specific engine version used in a project.

For interior, façade, or site-plan presentations, controlling the framing width and clipping planes determines which parts of the geometry remain visible. The documentation also notes that balancing Virtual Shadow Maps with orthographic rendering can be challenging in scenes that combine Nanite and non-Nanite geometry [1]. Volumetric clouds can also cause problems in orthographic views; the official explanation attributes this to the scene behaving differently at an orthographic scale. So, test the final result with the lighting, shadows, and volumetric effects that matter to the image.

The sources do not specify requirements for a particular graphics card, processor, or memory, so it is not possible to make hardware recommendations here. Similarly, these documents do not cover licensing, export, or cross-version compatibility requirements. In a production workflow, the priority should be to verify that orthographic views work with the required rendering features in the Unreal Engine version being used.

Common mistakes

• Assuming that increasing Ortho Width moves the camera farther away as it would in perspective: the setting changes the width of the scene area shown in the view.

• Forgetting to define the near and far planes when automatic clipping plane calculation is off: in this case, the planes must be set manually.

• Confusing viewport navigation controls with scene camera settings: editor controls navigate the view, while the Camera actor’s projection mode is a separate setting.

• Applying the experimental status in UE 5.3 to every Unreal Engine version: this qualification applies to the 5.3 release notes.