diff --git a/code/AssetLib/3DS/3DSExporter.cpp b/code/AssetLib/3DS/3DSExporter.cpp
index fed96a51f..ad8e10afe 100644
--- a/code/AssetLib/3DS/3DSExporter.cpp
+++ b/code/AssetLib/3DS/3DSExporter.cpp
@@ -290,12 +290,18 @@ void Discreet3DSExporter::WriteMaterials() {
             ChunkWriter curChunk(writer, Discreet3DS::CHUNK_MAT_SPECULAR);
             WriteColor(color);
         }
-
+                
         if (mat.Get(AI_MATKEY_COLOR_AMBIENT, color) == AI_SUCCESS) {
             ChunkWriter curChunk(writer, Discreet3DS::CHUNK_MAT_AMBIENT);
             WriteColor(color);
         }
 
+        float f;
+        if (mat.Get(AI_MATKEY_OPACITY, f) == AI_SUCCESS) {
+            ChunkWriter chunk(writer, Discreet3DS::CHUNK_MAT_TRANSPARENCY);
+            WritePercentChunk(1.0f - f);
+        }
+
         if (mat.Get(AI_MATKEY_COLOR_EMISSIVE, color) == AI_SUCCESS) {
             ChunkWriter curChunk(writer, Discreet3DS::CHUNK_MAT_SELF_ILLUM);
             WriteColor(color);
@@ -333,7 +339,6 @@ void Discreet3DSExporter::WriteMaterials() {
             writer.PutU2(static_cast<uint16_t>(shading_mode_out));
         }
 
-        float f;
         if (mat.Get(AI_MATKEY_SHININESS, f) == AI_SUCCESS) {
             ChunkWriter chunk(writer, Discreet3DS::CHUNK_MAT_SHININESS);
             WritePercentChunk(f);
diff --git a/code/Common/DefaultIOStream.cpp b/code/Common/DefaultIOStream.cpp
index 32f47ab07..449b6c1e1 100644
--- a/code/Common/DefaultIOStream.cpp
+++ b/code/Common/DefaultIOStream.cpp
@@ -5,8 +5,6 @@ Open Asset Import Library (assimp)
 
 Copyright (c) 2006-2020, assimp team
 
-
-
 All rights reserved.
 
 Redistribution and use of this software in source and binary forms,
@@ -52,27 +50,32 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 using namespace Assimp;
 
 namespace {
+
 template <size_t sizeOfPointer>
-size_t select_ftell(FILE *file) {
+inline size_t select_ftell(FILE *file) {
     return ::ftell(file);
 }
 
 template <size_t sizeOfPointer>
-int select_fseek(FILE *file, int64_t offset, int origin) {
+inline int select_fseek(FILE *file, int64_t offset, int origin) {
     return ::fseek(file, static_cast<long>(offset), origin);
 }
 
+
+    
 #if defined _WIN32 && (!defined __GNUC__ || __MSVCRT_VERSION__ >= 0x0601)
 template <>
-size_t select_ftell<8>(FILE *file) {
+inline size_t select_ftell<8>(FILE *file) {
     return (size_t)::_ftelli64(file);
 }
 
 template <>
-int select_fseek<8>(FILE *file, int64_t offset, int origin) {
+inline int select_fseek<8>(FILE *file, int64_t offset, int origin) {
     return ::_fseeki64(file, offset, origin);
 }
-#endif
+
+#endif // #if defined _WIN32 && (!defined __GNUC__ || __MSVCRT_VERSION__ >= 0x0601)
+    
 } // namespace
 
 // ----------------------------------------------------------------------------------
diff --git a/code/PostProcessing/TriangulateProcess.cpp b/code/PostProcessing/TriangulateProcess.cpp
index 8035b34f4..ebd35c997 100644
--- a/code/PostProcessing/TriangulateProcess.cpp
+++ b/code/PostProcessing/TriangulateProcess.cpp
@@ -64,6 +64,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "Common/PolyTools.h"
 
 #include <memory>
+#include <cstdint>
 
 //#define AI_BUILD_TRIANGULATE_COLOR_FACE_WINDING
 //#define AI_BUILD_TRIANGULATE_DEBUG_POLYS
@@ -141,7 +142,7 @@ bool TriangulateProcess::TriangulateMesh( aiMesh* pMesh)
     }
 
     // Find out how many output faces we'll get
-    unsigned int numOut = 0, max_out = 0;
+    uint32_t numOut = 0, max_out = 0;
     bool get_normals = true;
     for( unsigned int a = 0; a < pMesh->mNumFaces; a++) {
         aiFace& face = pMesh->mFaces[a];