diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 62ca9ed685..05002ca594 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -117,6 +117,8 @@ jobs:
           - { sdk-version: 2017, generator: Visual Studio 16 2019, arch: x64, str: windows-x64 }
           - { sdk-version: 2019, generator: Visual Studio 16 2019, arch: x64, str: windows-x64 }
           - { sdk-version: 2020, generator: Visual Studio 16 2019, arch: x64, str: windows-x64 }
+          - { sdk-version: 2023, generator: Visual Studio 16 2019, arch: x64, str: windows-x64 }
+          - { sdk-version: 2024, generator: Visual Studio 16 2019, arch: x64, str: windows-x64 }
 
     steps:
       - name: Checkout Plasma
diff --git a/Sources/Tools/MaxComponent/plBipedKiller.cpp b/Sources/Tools/MaxComponent/plBipedKiller.cpp
index 1c2d1caf17..b053a12743 100644
--- a/Sources/Tools/MaxComponent/plBipedKiller.cpp
+++ b/Sources/Tools/MaxComponent/plBipedKiller.cpp
@@ -375,7 +375,7 @@ bool HasBipController(INode* node)
     if (!node)
         return false;
     Control* c = node->GetTMController();
-    if (c && ((c->ClassID()== BIPSLAVE_CONTROL_CLASS_ID) ||
+    if (c && ((c->ClassID()== BIPDRIVEN_CONTROL_CLASS_ID) ||
         (c->ClassID()== BIPBODY_CONTROL_CLASS_ID) || 
         (c->ClassID()== FOOTPRINT_CLASS_ID)) )
         return true;
diff --git a/Sources/Tools/MaxConvert/hsControlConverter.cpp b/Sources/Tools/MaxConvert/hsControlConverter.cpp
index a1f13e9ea8..ca54fa59ad 100644
--- a/Sources/Tools/MaxConvert/hsControlConverter.cpp
+++ b/Sources/Tools/MaxConvert/hsControlConverter.cpp
@@ -127,7 +127,8 @@ void hsControlConverter::DeInit()
 class KRStatus : public KeyReduceStatus
 {
     void Init(int total) override { }
-    int Progress(int p) override { return KEYREDUCE_CONTINUE; }
+
+    KeyReduceResult Progress(int p) override { return KEYREDUCE_CONTINUE; }
 };
 
 void hsControlConverter::ReduceKeys(Control *control, float threshold)
diff --git a/Sources/Tools/MaxConvert/plMaxLightContext.h b/Sources/Tools/MaxConvert/plMaxLightContext.h
index 0dc48a6b09..ad0c5dd673 100644
--- a/Sources/Tools/MaxConvert/plMaxLightContext.h
+++ b/Sources/Tools/MaxConvert/plMaxLightContext.h
@@ -108,7 +108,11 @@ class plMaxLightContext : public ShadeContext
     void DPdUVW(Point3 dP[3],int channel=0) override { dP[0] = dP[1] = dP[2] = Point3(0,0,0); } // Bump vectors for UVW (camera space)
 
     void GetBGColor(Color &bgcol, Color& transp, BOOL fogBG=TRUE) override { bgcol.Black(); transp.Black(); }   // returns Background color, bg transparency
-
+    // these became virtual in 2023
+#if MAX_VERSION_MAJOR >= 26
+    Matrix3 MatrixTo(RefFrame ito) override { return Matrix3::Identity; }
+    Matrix3 MatrixFrom(RefFrame ifrom) override { return Matrix3::Identity; }
+#endif
     Point3 PointTo(const Point3& p, RefFrame ito) override { return p; }
     Point3 PointFrom(const Point3& p, RefFrame ifrom) override { return p; }
     Point3 VectorTo(const Point3& p, RefFrame ito) override { return p; }
diff --git a/Sources/Tools/MaxMain/MaxCompat.h b/Sources/Tools/MaxMain/MaxCompat.h
index 3156d8ebc5..91f00ef835 100644
--- a/Sources/Tools/MaxMain/MaxCompat.h
+++ b/Sources/Tools/MaxMain/MaxCompat.h
@@ -291,6 +291,12 @@ class plMaxObject : public plMaxAnimatable<T>
 
 // Old versions of Max define this as an integer, not a Class_ID
 #define XREFOBJ_COMPAT_CLASS_ID Class_ID(0x92aab38c, 0)
+// This definition is removed in later versions of the sdk
+// In newer versions of the sdk Progress returns an enum value of KeyReduceResult
+#if MAX_VERSION_MAJOR <= 25
+#   define BIPDRIVEN_CONTROL_CLASS_ID BIPSLAVE_CONTROL_CLASS_ID
+    using KeyReduceResult = int;
+#endif
 
 // Special 3ds Max message box support added in 2021 for HiDPI
 #if MAX_VERSION_MAJOR >= 23
diff --git a/cmake/Find3dsm.cmake b/cmake/Find3dsm.cmake
index 0a594570da..930e46832c 100644
--- a/cmake/Find3dsm.cmake
+++ b/cmake/Find3dsm.cmake
@@ -5,6 +5,8 @@ if(WIN32)
     # Of course, 32-bit 2013 is basically impossible to find. Oh well.
     if(CMAKE_SIZEOF_VOID_P EQUAL 8)
         set(_3dsm_PATH_HINTS
+            ENV ADSK_3DSMAX_SDK_2024
+            ENV ADSK_3DSMAX_SDK_2023
             ENV ADSK_3DSMAX_SDK_2022
             ENV ADSK_3DSMAX_SDK_2021
             ENV ADSK_3DSMAX_SDK_2020