diff --git a/embeddings.cpp b/embeddings.cpp
index c7bb116f..b9af6c0a 100644
--- a/embeddings.cpp
+++ b/embeddings.cpp
@@ -845,10 +845,11 @@ struct emb_euc_in_sph : emb_euclid_noniso {
     }
   };
 
+/* todo model change */
 struct emb_euc_in_nil : emb_euclid_noniso {
   bool is_euc_in_nil() override { return true; }
-  hyperpoint actual_to_intermediate(hyperpoint a) override { a[2] -= a[0] * a[1]; return a; }
-  transmatrix intermediate_to_actual_translation(hyperpoint i) override { i[2] += i[0] * i[1]; return rgpushxto0(i); }
+  hyperpoint actual_to_intermediate(hyperpoint a) override { a[2] -= a[0] * a[1] / 2; return a; }
+  transmatrix intermediate_to_actual_translation(hyperpoint i) override { i[2] += i[0] * i[1] / 2; return rgpushxto0(i); }
   transmatrix get_lsti() override { return cspin90(2, 1); }
   };