What Is Continuously Rasterize in After Effects?

The Continuously Rasterize switch in Adobe After Effects is a layer-level setting that maintains the crispness and infinite resolution of vector artwork and text layers regardless of how large they are scaled. By default, After Effects converts vector files into a fixed-resolution pixel grid when they are imported into a composition. Enabling this switch forces the software to recalculate the underlying mathematical paths for every frame and transformation, preventing pixelation and blurriness while fundamentally changing how effects and transforms are rendered.

How It Works on Vector Layers

When you import vector graphics—such as Adobe Illustrator (.AI), EPS, or PDF files—After Effects automatically rasters them to a set pixel resolution based on their initial dimensions. If you scale that layer beyond 100%, the software scales the rendered pixels rather than the original math, resulting in soft edges, pixelation, and visual artifacts.

Activating the Continuously Rasterize switch (represented by the small sun or starburst icon in the Timeline panel) instructs After Effects to delay the rasterization process until after transformations are applied. Instead of blowing up pre-rendered pixels, After Effects re-evaluates the vector paths at the new scale, zoom, or camera position, keeping lines, curves, and fills sharp at any scale.

How It Applies to Text and Shape Layers

Native text layers and shape layers created directly inside After Effects are inherently vector-based, meaning they are continuously rasterized by default. You will notice that their switch is already activated or unavailable in standard 2D workflows because the software natively preserves their edge fidelity as you scale them up.

However, when text or shape layers are placed inside a precomposition, the parent composition treats that nested comp as a flat, rasterized bitmap. Enabling the switch on the precomposition layer—where it acts as the "Collapse Transformations" switch—restores the vector calculations of the nested text and shapes, preserving their crisp edges and enabling them to interact within the parent composition's 3D space.

The Render Order Shift

Enabling Continuously Rasterize does more than preserve sharpness; it changes the standard render pipeline for the affected layer.

In a standard layer, After Effects processes elements in this sequence:

  1. Masks
  2. Effects
  3. Transformations (Position, Scale, Rotation)

When Continuously Rasterize is toggled on, transformations are applied before masks and effects. This means:

  • Effects are calculated on the transformed, re-rasterized boundaries rather than the original layer boundaries.
  • Layer masks adapt to the re-calculated vector data rather than clipping a static raster image.
  • Certain 2D effects that depend on static layer buffers may behave unexpectedly or produce different visual results.

Performance Considerations

Because Continuously Rasterize forces After Effects to compute complex vector math on every frame during playback and export, it requires significantly more processing power and RAM than rendering standard pixel layers. It is best practice to turn on the switch specifically for vector layers that exceed 100% scale or interact closely with 3D cameras, while leaving it off for static assets to optimize workflow and preview speeds.