Per-page imported dimensions in scene units (post-scale).
Number of image XObjects emitted as textured quads.
Page-local origin in world space, as [x, y, z]. The layout
strategy (PDFLoadOptions.layout) decides which axes
advance per page; unused axes stay 0.
Number of line segments emitted for this page.
Number of positioned text strings emitted as textured quads.
Number of fill triangles emitted for this page.
SceneModel populated with one object per imported page.
Result returned by PDFLoader.load on success.