# More definition beneath the Hall’s columns

A [close photograph looking toward Festival Hall](https://www.loc.gov/item/2013649761/) shows framed openings and window ledges above a nearer balustraded terrace. The overlap between the building and its foreground is easy to misread.

This pass adds simple divisions in the existing small windows and stepped sills beneath the tall bays. The earlier window surrounds and molded column bases remain. We are building related features together, then refining the group, rather than trying to finish one small ornament before moving on.

The photograph is evidence of appearance, not a measured building section. Small dimensions, repeated spacing, material finish and parts hidden by the terrace remain interpretations. Walking grades and the Hall’s collision footprint have not changed.

Comparing a [frontal completed view](https://www.loc.gov/item/2013649781/) and a [second view from the Grand Basin](https://www.loc.gov/item/2013649858/) left the small low doorway unassigned: it may belong to the Hall’s base or a foreground terrace wall. The model had placed an entrance at the Hall’s center, without evidence establishing that location. That opening and its new frame have been removed. Resolving a photograph’s ambiguity is part of building the model, even when the result is a correction rather than an addition.

The same review challenged a row of much smaller dark forms beneath the column bases. They blend with planting, people, furnishings and shadow; visible masonry surrounds do not establish them as openings. Our draft arch heads have been removed as well. The tall arched windows between the columns are a separate, clearly visible feature.

## Room to keep building

The Hall was approaching the size limit for an individual hosted file. Its structure and facade now load separately, alongside the existing ornament package. The structure is about 14.1 MB and the facade about 9.4 MB of uncompressed model data. Splitting them makes future additions manageable; it does not make the combined building smaller or promise a faster visit.

A preservation check compares every authored triangle, its surface attributes and material with the two-part version. Nothing is simplified or omitted. The Festival setting now has 24 independently loaded packages, and selecting the Hall requests all three of its parts.

An early draft of the lower-facade detail crossed our provisional whole-scene memory guard. Reusing exactly identical vertex data in the two Basin banks removed 10,880 duplicate entries. Their triangle order, normals, texture coordinates and material assignments remain unchanged. The existing guard then passed without being raised. This is useful housekeeping, while selective loading and further geographic divisions remain the longer-term approach.

## A lesson from a stalled check

A test stalled while trying to print a difference between large graphics-engine material objects. The building itself was not responsible. Checking the material actually used by each surface gave us a clearer assertion and a result in about a second. A short Sol investigation narrowed the problem to the test; the main task identified and fixed the assertion. We record that division of work without claiming a measured saving in tokens or subscription usage.

The [previous loading update](/records/release-103.md) explains the camera-direction work and its measured limits. Missing sculpture, the Hall’s unseen rear and the full Basin shoulder connections still need better evidence. This pass does not change the whole-fair completion estimate.

## Looking around the result

Before publication, a Sol reviewer explored the actual browser model with all 24 packages loaded. The sweep combined fixed views with seeded random angles, near and distant views, low and elevated cameras, and four directions of light. Seven original screenshots were kept with the camera and lighting notes. The main task checked one close entrance view as an integration check. No new visible defect was found that needed to hold up this release; that finding covers the inspected views, not every hidden surface or the unfinished interiors.