diff --git a/vsaa/funcs.py b/vsaa/funcs.py
index 16734c9..b603149 100644
--- a/vsaa/funcs.py
+++ b/vsaa/funcs.py
@@ -4,14 +4,14 @@
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, Literal
 
-from vsexprtools import ExprOp, complexpr_available, norm_expr
+from vsexprtools import complexpr_available, norm_expr
 from vskernels import Catrom, NoScale, Scaler, ScalerT, Bilinear
-from vsmasktools import EdgeDetect, EdgeDetectT, Morpho, Prewitt, ScharrTCanny
+from vsmasktools import EdgeDetect, EdgeDetectT, Prewitt, ScharrTCanny
 from vsrgtools import RepairMode, box_blur, contrasharpening_median, median_clips, repair, unsharp_masked
 from vstools import (
-    MISSING, CustomOverflowError, CustomRuntimeError, CustomValueError, FunctionUtil, MissingT, PlanesT, VSFunction,
+    MISSING, CustomOverflowError, CustomRuntimeError, FunctionUtil, MissingT, PlanesT, VSFunction,
     check_ref_clip, get_h, get_peak_value, get_w, get_y, join, normalize_planes, plane, scale_8bit, scale_value, split,
-    vs, padder
+    vs
 )
 
 from .abstract import Antialiaser, SingleRater
@@ -322,7 +322,7 @@ def based_aa(
         downscaler: ScalerT = Catrom,
         supersampler: ScalerT | FSRCNNXShaderT | ShaderFile | Path | Literal[False] = ArtCNN.C16F64,
         antialiaser: Antialiaser = Eedi3(0.125, 0.25, vthresh0=12, vthresh1=24, field=1, sclip_aa=None),
-        prefilter: Prefilter | vs.VideoNode = Prefilter.NONE, show_mask: bool | int = False, planes: PlanesT = 0,
+        prefilter: Prefilter | vs.VideoNode = Prefilter.NONE, show_mask: bool = False, planes: PlanesT = 0,
         **kwargs: Any
     ) -> vs.VideoNode:
         ...
@@ -333,7 +333,7 @@ def based_aa(
         downscaler: ScalerT = Catrom,
         supersampler: ScalerT | FSRCNNXShaderT | ShaderFile | Path | Literal[False] | MissingT = MISSING,
         antialiaser: Antialiaser = Eedi3(0.125, 0.25, vthresh0=12, vthresh1=24, field=1, sclip_aa=None),
-        prefilter: Prefilter | vs.VideoNode | MissingT = MISSING, show_mask: bool | int = False, planes: PlanesT = 0,
+        prefilter: Prefilter | vs.VideoNode | MissingT = MISSING, show_mask: bool = False, planes: PlanesT = 0,
         **kwargs: Any
     ) -> vs.VideoNode:
         try:
@@ -396,7 +396,7 @@ def based_aa(
             if not func.luma_only:
                 lmask = Catrom.resample(join(lmask, lmask, lmask), work_clip)
 
-        if show_mask == 1:
+        if show_mask:
             return lmask
 
         supersampler = Scaler.ensure_obj(supersampler, based_aa)
@@ -410,24 +410,10 @@ def based_aa(
         aa = antialiaser.interpolate(ss, False, sclip=ss, mclip=mclip_up).std.Transpose()
         aa = antialiaser.interpolate(aa, False, sclip=aa, mclip=mclip_up.std.Transpose()).std.Transpose()
 
-        pmask = norm_expr([ss, aa], 'x y = 0 range_size ?')
-        pmask = padder.COLOR(pmask.std.Crop(2, 2, 2, 2), 2, 2, 2, 2)
-        pmask = resize_aa_mask(pmask, work_clip.width, work_clip.height)
-        pmask = Morpho.maximum(norm_expr(pmask, 'x range_size 0 ?'), iterations=3)
-
-        lpmask = ExprOp.MIN(lmask, pmask)
-
-        if show_mask == 2:
-            return pmask
-        elif show_mask == 3:
-            return lpmask
-        elif show_mask:
-            raise CustomValueError('Wrong show_mask value! It can be one of 1 (True), 2, 3', based_aa)
-
         aa = downscaler.scale(aa, work_clip.width, work_clip.height)
         no_aa = downscaler.scale(ss, work_clip.width, work_clip.height)
 
         aa_merge = norm_expr([work_clip, aa, no_aa], "y z = x y ?")
-        aa_merge = work_clip.std.MaskedMerge(aa_merge, lpmask)
+        aa_merge = work_clip.std.MaskedMerge(aa_merge, lmask)
 
         return func.return_clip(aa_merge)