When im creating the faces, i know their exact number, but to speedup the rendering, I want to merge them by their common texture. I dont know the number of the merged faces, so I have to make one [loop trough all the faces](https://github.com/JDragan/CoreQ3BSP/blob/a9242fed0e603628b8c1e901a258a34edb899ad7/src/coreBSP.nim#L93) and find the number of unique texture/lightmap combinations.
Then from this number i have the size of the render data (number of merged faces) Then I do another loop to fill the data. With tables I dont have to do that, I can do that in the first loop
