Perforated materials in ifc

Some elements appear to be transparent despite being made of rather opaque materials. This would be something like a wall made of chain link fence material or a slab of perforated metal sheeting. Right now I assign a material that will describe the circumstances and allow for a proper quantification. These materials just do not look right when running into them inside an ifc viewer or blenderbim. What would be the best approach to tackle this?

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