That seems to work. However, make sure to update "lg_colors.lst" and "lg_elements.lst", otherwise L3P doesn't know which parts and colors to convert, similarly to "LGEO.xml".
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Also, I think the regular bricks should have a slight waviness in their normals as well. Does LDView not add one by default?
[edit]
Also, I think the regular bricks should have a slight waviness in their normals as well. Does LDView not add one by default?