public void AddInstancedRenderItem(ModelMesh mesh, RenderableComponent renderable, MeshEffect effect)
{
if (!InstanceData.TryGetValue(mesh, out var instanceData))
{
InstanceData.Add(mesh, instanceData = new RenderInstanceData(mesh));
mesh.BuildRenderList(this, instanceData, effect);
}
instanceData.InstancedRenderables.Add(new InstancedRenderable(renderable));
}