message: tweaked polymer trace for coarse units
diff: @@ -36,6 +36,7 @@ async function createPolymerTraceMesh(ctx: RuntimeContext, unit: Unit, structure
  const vertexCount = linearSegments * radialSegments * polymerElementCount + (radialSegments + 1) * polymerElementCount * 2
  const builder = MeshBuilder.create(vertexCount, vertexCount / 10, mesh)
  + const isCoarse = Unit.isCoarse(unit)
  const state = createCurveSegmentState(linearSegments)
  const { curvePoints, normalVectors, binormalVectors } = state
  @@ -54,6 +55,7 @@ async function createPolymerTraceMesh(ctx: RuntimeContext, unit: Unit, structure
  interpolateCurveSegment(state, v, tension, shift)
  let width = sizeTheme.size(v.center)
  + if (isCoarse) width *= aspectRatio / 2
  if (isSheet) {
  const height = width * aspectRatio
  