diff --git a/src/experimental/filament/compat/scene_objects.cc b/src/experimental/filament/compat/scene_objects.cc
index a5f321d3..b05daeb3 100644
--- a/src/experimental/filament/compat/scene_objects.cc
+++ b/src/experimental/filament/compat/scene_objects.cc
@@ -115,7 +115,7 @@ static void UpdateSkinFlexMeshData(mjrfMeshData* data, const mjModel* model,
     num_indices = 3 * scene->flexfaceused[geom.objid];
   }
 
-  data->nattributes = uvs.data() ? 3 : 2;
+  data->num_attributes = uvs.data() ? 3 : 2;
   data->attributes[0].usage = mjVERTEX_ATTRIBUTE_USAGE_POSITION;
   data->attributes[0].type = mjVERTEX_ATTRIBUTE_TYPE_FLOAT3;
   data->attributes[0].bytes = positions.data();
diff --git a/src/experimental/platform/ux/imgui_bridge.cc b/src/experimental/platform/ux/imgui_bridge.cc
index 4c5d2582..f2680ba4 100644
--- a/src/experimental/platform/ux/imgui_bridge.cc
+++ b/src/experimental/platform/ux/imgui_bridge.cc
@@ -221,7 +221,7 @@ void ImguiBridge::Update() {
 
     mjrfMeshData data;
     mjrf_defaultMeshData(&data);
-    data.nattributes = 3;
+    data.num_attributes = 3;
     data.attributes[0].usage = mjVERTEX_ATTRIBUTE_USAGE_POSITION;
     data.attributes[0].type = mjVERTEX_ATTRIBUTE_TYPE_FLOAT2;
     data.attributes[0].bytes = cmds->VtxBuffer.Data;
diff --git a/src/render/filament/core/builtins.cc b/src/render/filament/core/builtins.cc
index c5216f3a..e9a60225 100644
--- a/src/render/filament/core/builtins.cc
+++ b/src/render/filament/core/builtins.cc
@@ -78,7 +78,7 @@ class BuiltinBuilder : public mjrfMeshData {
 
   mjrfMeshData* PrepareMeshData() {
     // Update the `mjrfMeshData` fields.
-    nattributes = 2;
+    num_attributes = 2;
     attributes[0].usage = mjVERTEX_ATTRIBUTE_USAGE_POSITION;
     attributes[0].type = mjVERTEX_ATTRIBUTE_TYPE_FLOAT3;
     attributes[0].bytes = reinterpret_cast<const void*>(positions_.data());
diff --git a/src/render/filament/core/mesh.cc b/src/render/filament/core/mesh.cc
index 51c094de..c80a1fa1 100644
--- a/src/render/filament/core/mesh.cc
+++ b/src/render/filament/core/mesh.cc
@@ -156,7 +156,7 @@ void Mesh::BuildVertexBuffer(const mjrfMeshData& data) {
   const mjrVertexAttribute* positions = nullptr;
   const mjrVertexAttribute* normals = nullptr;
   const mjrVertexAttribute* tangents = nullptr;
-  for (int i = 0; i < data.nattributes; ++i) {
+  for (int i = 0; i < data.num_attributes; ++i) {
     if (data.attributes[i].usage == mjVERTEX_ATTRIBUTE_USAGE_POSITION) {
       positions = &data.attributes[i];
     } else if (data.attributes[i].usage == mjVERTEX_ATTRIBUTE_USAGE_NORMAL) {
@@ -190,7 +190,7 @@ void Mesh::BuildVertexBuffer(const mjrfMeshData& data) {
     // starting from the first attribute's payload.
     vb_builder.bufferCount(1);
     int total_vertex_size = 0;
-    for (int i = 0; i < data.nattributes; ++i) {
+    for (int i = 0; i < data.num_attributes; ++i) {
       total_vertex_size += VertexAttributeTypeSize(data.attributes[i]);
     }
     const void* bytes = data.attributes[0].bytes;
@@ -200,7 +200,7 @@ void Mesh::BuildVertexBuffer(const mjrfMeshData& data) {
     // attributes. As such, the stride is equal to the total vertex size and
     // each offset is the sum of the sizes of the preceding attributes.
     int offset = 0;
-    for (int i = 0; i < data.nattributes; ++i) {
+    for (int i = 0; i < data.num_attributes; ++i) {
       const mjrVertexAttribute& attrib = data.attributes[i];
       const filament::VertexAttribute usage = GetUsage(attrib);
       filament::VertexBuffer::AttributeType type = GetType(attrib);
@@ -218,8 +218,8 @@ void Mesh::BuildVertexBuffer(const mjrfMeshData& data) {
   } else {
     // For a non-interleaved vertex buffer, we assign a separate buffer to each
     // attribute.
-    vb_builder.bufferCount(data.nattributes);
-    for (int i = 0; i < data.nattributes; ++i) {
+    vb_builder.bufferCount(data.num_attributes);
+    for (int i = 0; i < data.num_attributes; ++i) {
       const mjrVertexAttribute& attrib = data.attributes[i];
       const filament::VertexAttribute usage = GetUsage(attrib);
       filament::VertexBuffer::AttributeType type = GetType(attrib);
@@ -233,11 +233,11 @@ void Mesh::BuildVertexBuffer(const mjrfMeshData& data) {
       }
       attributes_[i] = usage;
     }
-    num_attributes_ = data.nattributes;
+    num_attributes_ = data.num_attributes;
     vertex_buffer_ = vb_builder.build(*engine_);
 
     // Assign the individual data buffers.
-    for (int i = 0; i < data.nattributes; ++i) {
+    for (int i = 0; i < data.num_attributes; ++i) {
       const mjrVertexAttribute& attrib = data.attributes[i];
       const void* bytes = attrib.bytes;
       size_t nbytes = data.num_vertices * VertexAttributeTypeSize(attrib);
diff --git a/src/render/filament/mjrfilament.h b/src/render/filament/mjrfilament.h
index 872a6423..22459add 100644
--- a/src/render/filament/mjrfilament.h
+++ b/src/render/filament/mjrfilament.h
@@ -254,7 +254,7 @@ enum { mjMAX_VERTEX_ATTRIBUTES = 16 };
 
 struct mjrfMeshData_ {     // binary data for a mesh (mjrfMesh)
   mjtSize num_vertices;    // number of vertices; all vertex attributes share this size
-  int nattributes;         // number of attributes defined
+  int num_attributes;      // number of attributes defined
   mjrVertexAttribute attributes[mjMAX_VERTEX_ATTRIBUTES];  // per-vertex attribute information
   mjtBool interleaved;     // true if vertex attributes are interleaved
   mjtSize num_indices;     // number of indices
diff --git a/src/render/filament/support/model_objects.cc b/src/render/filament/support/model_objects.cc
index 731c451d..8fb6aeb6 100644
--- a/src/render/filament/support/model_objects.cc
+++ b/src/render/filament/support/model_objects.cc
@@ -364,7 +364,7 @@ static void UpdateMeshData(mjrfMeshData* data, const mjModel* model, int id,
   data->index_type = data->num_vertices >= std::numeric_limits<uint16_t>::max()
                          ? mjINDEX_TYPE_U32
                          : mjINDEX_TYPE_U16;
-  data->nattributes = has_uvs ? 3 : 2;
+  data->num_attributes = has_uvs ? 3 : 2;
   data->attributes[0].usage = mjVERTEX_ATTRIBUTE_USAGE_POSITION;
   data->attributes[0].type = mjVERTEX_ATTRIBUTE_TYPE_FLOAT3;
   data->attributes[0].bytes = builder->positions.data();