public override void OnPaintSceneGUI(GridLayout grid, GameObject layer, BoundsInt position, GridBrushBase.Tool tool, bool executing)
{
LevelBrush.InitializeLevelCacheIfNecessary();
var invalidFloors = LevelBrush.GetAllInvalidFloors();
BrushEditorUtility.BeginQuads(new Color(1f, 0f, 0f, 0.5f));
foreach (var pos in invalidFloors)
{
BrushEditorUtility.DrawQuadBatched(grid, pos);
}
BrushEditorUtility.EndQuads();
base.OnPaintSceneGUI(grid, layer, position, tool, executing);
}