Content pass: new photo textures, picture frames built with
PictureFrameBuilder in the scene, Frame Inner.mat tweak; removed the
now-obsolete photo materials and Paint prefab variants.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Frame thickness, corner radius, padding, inner depth and picture depth
are now normalized factors (scale with Size, no dead clamp zones).
Picture aspect is computed inside-out so padding and frame thickness
no longer distort the image. New Frame Inner.mat as inner default.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>