Use Blueprint Canvas Draw Triangles

I am trying to use Draw Triangles Canvas. It takes as a parameter an array of CanvasUVTri.

I cannot create a variable of type CanvasUVTri or an variable that is an Array of that type either as a blueprint variable.

I can however Make CanvasUVTri. Using a static length array and Make Array I can do this manually. But not sure how to do this in a forloop like I will need.

Does anyone have an example of how to use this function in Blueprint. I would like to generate the triangles programtically within blue print.

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