diff --git a/cases/3d/modern/stl/bottom.stl b/cases/3d/modern/stl/L_bottom.stl
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rename to cases/3d/modern/stl/L_bottom.stl
diff --git a/cases/3d/modern/stl/top.stl b/cases/3d/modern/stl/L_top.stl
similarity index 100%
rename from cases/3d/modern/stl/top.stl
rename to cases/3d/modern/stl/L_top.stl
diff --git a/cases/3d/modern/stl/R_bottom.stl b/cases/3d/modern/stl/R_bottom.stl
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diff --git a/cases/3d/modern/stl/R_top.stl b/cases/3d/modern/stl/R_top.stl
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