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flexcompute · Aug 9, 2024 · f67964c · f67964c
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Showing 2 changed files with 7 additions and 9 deletions.
diff --git a/tidy3d/components/grid/mesher.py b/tidy3d/components/grid/mesher.py
@@ -522,13 +522,9 @@ def structure_steps(
         min_steps = []
         for structure in structures:
             if isinstance(structure, Structure):
-                if (
-                    isinstance(structure.medium, (PECMedium, Medium2D))
-                    or isinstance(structure.medium, LossyMetalMedium)
-                    or (
-                        isinstance(structure.medium, AnisotropicMedium)
-                        and structure.medium.is_comp_pec(axis)
-                    )
+                if isinstance(structure.medium, (PECMedium, Medium2D, LossyMetalMedium)) or (
+                    isinstance(structure.medium, AnisotropicMedium)
+                    and structure.medium.is_comp_pec(axis)
                 ):
                     # for 2d medium, will always ignore even if not PEC;
                     # later, this will be handled by _grid_corrections_2dmaterials

diff --git a/tidy3d/components/medium.py b/tidy3d/components/medium.py
@@ -6016,12 +6016,14 @@ class SkinDepthFitterParam(Tidy3dBaseModel):
 
 
 class LossyMetalMedium(Medium):
-    """Lossy metal modeled with a surface impedance boundary condition (SIBC).
+    """Lossy metal that can be modeled with a surface impedance boundary condition (SIBC).
 
     Notes
     -----
 
-        SIBC is suitable when the skin depth is much smaller than the structure feature size.
+        SIBC is most accurate when the skin depth is much smaller than the structure feature size.
+        If not the case, please use a regular medium instead, or set ``simulation.subpixel.lossy_metal``
+        to ``td.VolumetricAveraging()`` or ``td.Staircasing()``.
 
     Example
     -------