anchor.diff:                  let height =
                       match tileSetOpt with
                       | None -> 0.0f
  -                    | Some tileSet -> single (tile.Gid - tileSet.FirstGid) * 0.5f
  +                    | Some tileSet -> single (tile.Gid - tileSet.FirstGid) * heightScalar
                   let u = t * 6
  -                let position = v3 (single i) height (single j)
  +                let position = v3 (single i) height (single j) + offset
                   positions.[u] <- position
                   positions.[u+1] <- position + v3Right
                   positions.[u+2] <- position + v3Right + v3Forward
  
positive.code: [<RequireQualifiedAccess>]
  module Field =
  
      let CachedDescriptors = dictPlus<StaticModel AssetTag, Map<Vector2i, single>> HashIdentity.Structural []
  
      let private createFieldSurfaceDescriptorAndHeightMap tileMapWidth tileMapHeight (tileSets : TmxTileset array) (tileLayer : TmxLayer) (heightLayer : TmxLayer) =
  
          // make positions array
          let positions = Array.zeroCreate<Vector3> (tileMapWidth * tileMapHeight * 6)
  
          // initialize positions flat
          for i in 0 .. dec tileMapWidth do
              for j in 0 .. dec tileMapHeight do
                  let t = j * tileMapWidth + i
  
negative.code:                     [Entity.CubeMap == Assets.Default.SkyBoxMap]
                   Content.staticModelSurface Gen.name
                      [Entity.SurfaceIndex == 0
                       Entity.Size <== field --|> fun field world -> Triple.snd (Field.getFieldStaticModelAndSizeAndHeightMap field world)
                       Entity.StaticModel <== field --|> fun field world -> Triple.fst (Field.getFieldStaticModelAndSizeAndHeightMap field world)
                       Entity.RenderStyle == Forward 0.0f]
                   Content.staticModelSurface Gen.name
                      [Entity.SurfaceIndex == 1
                       Entity.Size <== field --|> fun field world -> Triple.snd (Field.getFieldStaticModelAndSizeAndHeightMap field world)
                       Entity.StaticModel <== field --|> fun field world -> Triple.fst (Field.getFieldStaticModelAndSizeAndHeightMap field world)
                       Entity.RenderStyle == Forward -1.0f]]]]
  
      override this.Register (game, world) =
  