message: Fix for an older issues that was causing bad indices to be used
diff: @@ -462,7 +462,7 @@ export default class Coverter {
  let k = 0
  while (k < faces.length) {
  let n = faces[k]
  - if (n <= 3) n += 3 // 0 -> 3, 1 -> 4
  + if (n < 3) n += 3 // 0 -> 3, 1 -> 4
  if (n === 3) {
  // Triangle face
  