Amplify Impostors

About Amplify Impostors – Unity Editor Tool & Plugin

Unity Impostor Generation and LOD Tool

Amplify Impostors creates simplified geometric representations of complex 3D models while preserving their volumetric appearance. Its baking workflow converts source objects into camera-facing impostors that can represent detailed geometry at a distance, making the tool relevant to Unity projects that use level-of-detail techniques to manage complex scenes.

Impostor Types and Visual Controls

The tool provides spherical and octahedral impostors, with smart blending between views to transition between viewing angles. A Billboard Shape Editor allows the impostor geometry to be adjusted, and an optional position texture can improve representation accuracy. Impostors can be moved, rotated, and scaled, receive and cast shadows, and intersect with other objects or impostors.

GPU-based hardware instancing supports the rendering workflow, while depth writing handles object intersections. Dithered cross-fading supports transitions between levels of detail, and generated impostors can be used with Unity's LODGroup component or third-party LOD systems.

Baking and Shader Compatibility

The one-click baking workflow generates impostors from existing objects. Custom Material Baking provides an alternative for objects using custom shaders, and automatic shader importers support URP and HDRP workflows. Standard baking requires shaders that expose a Deferred rendering path, although the resulting impostors can be used with both Forward and Deferred rendering.

Custom shader support depends on Deferred-mode compatibility. Forward-only shaders may require Custom Baking and custom runtime impostor shaders. HDRP translucent objects may not bake correctly, and lightmapping impostors is not recommended.

Use Cases

• Outdoor environments with distant trees and other complex scenery that can be represented by simplified geometry.
• Projects integrating impostors into existing LOD systems to transition between detailed models and simpler representations.
• Scenes with repeated objects that can use GPU instancing for impostor rendering.
• Projects requiring custom shader baking for objects that cannot use the standard baking workflow.

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