standalone: shape-world look round 2 -- shards gone, calmer layered relief, still 0.72 s / 1.6 s cold

- Removed the thin automatic room-support slabs that left floating caps (in-view detached thin
  sheets 9 -> 0; the audit now also fails on isolated small components).
- Bounded 16-voxel floor/wall blend (18 rejected: it created a sub-voxel sheet), 3-voxel
  strata/cave blend, C1 tunnel radius profile (0 radius/slope steps at joins).
- Surface relief: broad octave with amplitude modulation instead of uniform bumps.
- Cold, no cache: 64 m full detail 0.924 s (8 workers) / 0.715 s (16); whole view 2.016 / 1.605 s.
- 1-worker and 6-worker hashes match; 5,642/5,642 passage samples open.
Not solved: regular bands in the narrow passage shafts, a few slivers on tile boundaries, faint
wall/floor plates; close-view mean surface distance to the owner field got worse (see REPORT.md).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ

Standalone/Research/OwnerShapeWorld/round2/RunMachine.ps1

@@ -0,0 +1,36 @@
+[CmdletBinding()]
+param(
+    [Parameter(Mandatory=$true)][string]$ExecutableName,
+    [Parameter(Mandatory=$true)][string[]]$ExecutableArguments,
+    [Parameter(Mandatory=$true)][string]$LogStem
+)
+
+$ErrorActionPreference = 'Stop'
+$RoundDir = [IO.Path]::GetFullPath($PSScriptRoot)
+$StandaloneRoot = [IO.Path]::GetFullPath((Join-Path $PSScriptRoot '..\..\..'))
+if ([IO.Path]::GetFileName($ExecutableName) -ne $ExecutableName) { throw 'ExecutableName must be a filename.' }
+if ([IO.Path]::GetFileName($LogStem) -ne $LogStem) { throw 'LogStem must be a filename stem.' }
+$ExecutablePath = Join-Path (Join-Path $StandaloneRoot 'bin') $ExecutableName
+if (-not (Test-Path -LiteralPath $ExecutablePath -PathType Leaf)) { throw "Executable not found: $ExecutablePath" }
+$StdoutPath = Join-Path $RoundDir ($LogStem + '.stdout.log')
+$StderrPath = Join-Path $RoundDir ($LogStem + '.stderr.log')
+
+$HostProcess = Get-Process -Id $PID
+$HostProcess.PriorityClass = 'Normal'
+$HostProcess.ProcessorAffinity = [IntPtr]0xFFFF
+$Child = Start-Process -FilePath $ExecutablePath -ArgumentList $ExecutableArguments `
+    -WorkingDirectory $StandaloneRoot -WindowStyle Hidden -PassThru `
+    -RedirectStandardOutput $StdoutPath -RedirectStandardError $StderrPath
+$PeakWorkingSet = 0L
+while (-not $Child.HasExited) {
+    $Child.Refresh()
+    if ($Child.HasExited) { break }
+    $Child.PriorityClass = 'Normal'
+    $Child.ProcessorAffinity = [IntPtr]0xFFFF
+    $PeakWorkingSet = [Math]::Max($PeakWorkingSet,$Child.WorkingSet64)
+    Start-Sleep -Milliseconds 500
+}
+$Child.WaitForExit()
+$Child.Refresh()
+Write-Output "RUN_EXIT pid=$($Child.Id) priority=Normal affinity=0xFFFF peak_process_gb=$([math]::Round($PeakWorkingSet/1GB,2)) exit_code=$($Child.ExitCode)"
+exit $Child.ExitCode