diff --git a/3rdparty/meshoptimizer/LICENSE.md b/3rdparty/meshoptimizer/LICENSE.md
index 3c52415f6..b673c248b 100644
--- a/3rdparty/meshoptimizer/LICENSE.md
+++ b/3rdparty/meshoptimizer/LICENSE.md
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2016-2021 Arseny Kapoulkine
+Copyright (c) 2016-2022 Arseny Kapoulkine
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/3rdparty/meshoptimizer/src/indexgenerator.cpp b/3rdparty/meshoptimizer/src/indexgenerator.cpp
index f60db0dc4..9a25c2189 100644
--- a/3rdparty/meshoptimizer/src/indexgenerator.cpp
+++ b/3rdparty/meshoptimizer/src/indexgenerator.cpp
@@ -187,7 +187,7 @@ size_t meshopt_generateVertexRemap(unsigned int* destination, const unsigned int
 	using namespace meshopt;
 
 	assert(indices || index_count == vertex_count);
-	assert(index_count % 3 == 0);
+	assert(!indices || index_count % 3 == 0);
 	assert(vertex_size > 0 && vertex_size <= 256);
 
 	meshopt_Allocator allocator;
diff --git a/3rdparty/meshoptimizer/src/meshoptimizer.h b/3rdparty/meshoptimizer/src/meshoptimizer.h
index c070e2872..f94dbaf9d 100644
--- a/3rdparty/meshoptimizer/src/meshoptimizer.h
+++ b/3rdparty/meshoptimizer/src/meshoptimizer.h
@@ -1,7 +1,7 @@
 /**
- * meshoptimizer - version 0.17
+ * meshoptimizer - version 0.18
  *
- * Copyright (C) 2016-2021, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)
+ * Copyright (C) 2016-2022, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)
  * Report bugs and download new versions at https://github.com/zeux/meshoptimizer
  *
  * This library is distributed under the MIT License. See notice at the end of this file.
@@ -12,7 +12,7 @@
 #include <stddef.h>
 
 /* Version macro; major * 1000 + minor * 10 + patch */
-#define MESHOPTIMIZER_VERSION 170 /* 0.17 */
+#define MESHOPTIMIZER_VERSION 180 /* 0.18 */
 
 /* If no API is defined, assume default */
 #ifndef MESHOPTIMIZER_API
@@ -322,7 +322,7 @@ enum
 };
 
 /**
- * Experimental: Mesh simplifier
+ * Mesh simplifier
  * Reduces the number of triangles in the mesh, attempting to preserve mesh appearance as much as possible
  * The algorithm tries to preserve mesh topology and can stop short of the target goal based on topology constraints or target error.
  * If not all attributes from the input mesh are required, it's recommended to reindex the mesh using meshopt_generateShadowIndexBuffer prior to simplification.
@@ -336,7 +336,7 @@ enum
  * options must be a bitmask composed of meshopt_SimplifyX options; 0 is a safe default
  * result_error can be NULL; when it's not NULL, it will contain the resulting (relative) error after simplification
  */
-MESHOPTIMIZER_EXPERIMENTAL size_t meshopt_simplify(unsigned int* destination, const unsigned int* indices, size_t index_count, const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride, size_t target_index_count, float target_error, unsigned int options, float* result_error);
+MESHOPTIMIZER_API size_t meshopt_simplify(unsigned int* destination, const unsigned int* indices, size_t index_count, const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride, size_t target_index_count, float target_error, unsigned int options, float* result_error);
 
 /**
  * Experimental: Mesh simplifier (sloppy)
@@ -366,12 +366,12 @@ MESHOPTIMIZER_EXPERIMENTAL size_t meshopt_simplifySloppy(unsigned int* destinati
 MESHOPTIMIZER_EXPERIMENTAL size_t meshopt_simplifyPoints(unsigned int* destination, const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride, size_t target_vertex_count);
 
 /**
- * Experimental: Returns the error scaling factor used by the simplifier to convert between absolute and relative extents
+ * Returns the error scaling factor used by the simplifier to convert between absolute and relative extents
  *
  * Absolute error must be *divided* by the scaling factor before passing it to meshopt_simplify as target_error
  * Relative error returned by meshopt_simplify via result_error must be *multiplied* by the scaling factor to get absolute error.
  */
-MESHOPTIMIZER_EXPERIMENTAL float meshopt_simplifyScale(const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride);
+MESHOPTIMIZER_API float meshopt_simplifyScale(const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride);
 
 /**
  * Mesh stripifier
@@ -1044,7 +1044,7 @@ inline void meshopt_spatialSortTriangles(T* destination, const T* indices, size_
 #endif
 
 /**
- * Copyright (c) 2016-2021 Arseny Kapoulkine
+ * Copyright (c) 2016-2022 Arseny Kapoulkine
  *
  * Permission is hereby granted, free of charge, to any person
  * obtaining a copy of this software and associated documentation