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/AssetLib/FBX/FBXBinaryTokenizer.cpp b/code/AssetLib/FBX/FBXBinaryTokenizer.cpp
index 719b928bc..78f02ff96 100644
--- a/code/AssetLib/FBX/FBXBinaryTokenizer.cpp
+++ b/code/AssetLib/FBX/FBXBinaryTokenizer.cpp
@@ -54,6 +54,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/Exceptional.h>
 #include <assimp/ByteSwapper.h>
 #include <assimp/DefaultLogger.hpp>
+#include <assimp/StringUtils.h>
 
 namespace Assimp {
 namespace FBX {
@@ -456,11 +457,21 @@ void TokenizeBinary(TokenList& output_tokens, const char* input, size_t length)
 	ASSIMP_LOG_DEBUG_F("FBX version: ", version);
 	const bool is64bits = version >= 7500;
     const char *end = input + length;
-    while (cursor < end ) {
-		if (!ReadScope(output_tokens, input, cursor, input + length, is64bits)) {
-            break;
+    try
+    {
+        while (cursor < end ) {
+		    if (!ReadScope(output_tokens, input, cursor, input + length, is64bits)) {
+                break;
+            }
         }
     }
+    catch (const DeadlyImportError& e)
+    {
+        if (!is64bits && (length > std::numeric_limits<std::uint32_t>::max())) {
+            throw DeadlyImportError("The FBX file is invalid. This may be because the content is too big for this older version (" + to_string(version) + ") of the FBX format. (" + e.what() + ")");
+        }
+        throw;
+    }
 }
 
 } // !FBX