diff --git a/src/sp_validation/calibration.py b/src/sp_validation/calibration.py
index e0ab212e..9eaaf42e 100644
--- a/src/sp_validation/calibration.py
+++ b/src/sp_validation/calibration.py
@@ -697,7 +697,9 @@ class metacal:
     data :
         input galaxy catalogue
     mask : array of bool
-        mask according to galaxy selection, e.g. spread_model
+        pre-selection mask, e.g. flag, magnitude and footprint cuts; the
+        size-based galaxy selection (``rel_size_min`` < T/Tpsf <
+        ``rel_size_max``) is applied here
     masking_type : string, optional, default='gal'
         masking type, one in 'gal', 'gal_mom', 'star'
     step : float, optional, default=0.01
diff --git a/workflow/image_sims/params_im_sim.py b/workflow/image_sims/params_im_sim.py
index b7db399e..09d19bc1 100644
--- a/workflow/image_sims/params_im_sim.py
+++ b/workflow/image_sims/params_im_sim.py
@@ -192,9 +192,6 @@
 gal_mag_bright = 15
 gal_mag_faint = 30
 
-### Spread-model
-do_spread_model = False
-
 ### SExtractor flags to keep in addition to FLAGS=0
 ### (bit-coded; list of powers of 2);
 ### Empty list if no flags