diff --git a/assets.d b/assets.d
index 921ed79..aa8c3af 100644
--- a/assets.d
+++ b/assets.d
@@ -82,7 +82,6 @@ struct Material
 {
 	u32                  pipeline_id;
 	MaterialMap[MMI.max] maps;
-	Vec4                 params;
 }
 
 struct Vertex
@@ -98,6 +97,8 @@ struct Mesh
 {
 	Vertex[] vtx;
 	u32[]    idx;
+	u64      start;
+	u64      length;
 	u32      mat_id;
 }
 
@@ -723,7 +724,9 @@ AddMeshVertices(cgltf_accessor* accessor, Model* model, u64 mesh_index, u64* vtx
 {
 	if(model.meshes[mesh_index].vtx == null)
 	{
-		model.meshes[mesh_index].vtx = model.vtx_buf[*vtx_count .. *vtx_count+accessor.count];
+		model.meshes[mesh_index].vtx    = model.vtx_buf[*vtx_count .. *vtx_count+accessor.count];
+		model.meshes[mesh_index].start  = *vtx_count;
+		model.meshes[mesh_index].length = accessor.count;
 		*vtx_count += accessor.count;
 	}
 }