From 807bd72b37c2394a9802bf916f314f8fba775f37 Mon Sep 17 00:00:00 2001
From: Paul Yushkevich <pyushkevich@gmail.com>
Date: Fri, 3 Jan 2025 16:23:04 -0500
Subject: [PATCH] FIX: segmentations layers should not have linear
 interpolation

---
 GUI/Renderer/GenericSliceRenderer.cxx | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/GUI/Renderer/GenericSliceRenderer.cxx b/GUI/Renderer/GenericSliceRenderer.cxx
index de807cd8..48149548 100644
--- a/GUI/Renderer/GenericSliceRenderer.cxx
+++ b/GUI/Renderer/GenericSliceRenderer.cxx
@@ -776,8 +776,11 @@ void GenericSliceRenderer::UpdateLayerApperances()
 
         // Pass the interpolation mode to the layer (for non-orthogonal slicing)
         const GlobalDisplaySettings *gds = m_Model->GetParentUI()->GetGlobalDisplaySettings();
-        bool is_linear = gds->GetGreyInterpolationMode() == GlobalDisplaySettings::LINEAR;
-        it.GetLayer()->SetSlicingInterpolationMode(is_linear ? ImageWrapperBase::LINEAR : ImageWrapperBase::NEAREST);
+        bool is_linear =
+          (it.GetRole() != LABEL_ROLE) &&
+          (gds->GetGreyInterpolationMode() == GlobalDisplaySettings::LINEAR);
+        it.GetLayer()->SetSlicingInterpolationMode(
+          is_linear ? ImageWrapperBase::LINEAR : ImageWrapperBase::NEAREST);
 
         // For orthogonal slicing, interpolation is passed to the texture assembly
         auto *lta = GetLayerTextureAssembly(it.GetLayer());