@Luckylarv I really like the picture, especially the mallorn trees are very near to the description in the book.
"The brances of the mallorn-tree grew out nearly straight from the trunk, and then swept upward; but near the top the main stem divided into a crown of many boughs, ..."
@BeatHeav3N, I tried some smaller mallorn trees, I think its possible to build small trees with normal logs. I have already made quite a lot of small trees in my themed builds. But I dont like using wool for leaves. The missing transparency makes the trees looking wrong. I tried less dense canopys but that does not really help. Is there any chance to get transparent mallorn leaves, for example would it be possible to retexture spruce leaves?
Another problem is, that the trees in Lothlorien are mostly very dense without clrearings. Our first concept is build in a place with exceptionally many clearings. I wonder if it would be possible within this project to remove some of the large mallorn trees to get more clearings. The actual forest ist very dark and most trees have moreless the same size. A natural forest would have trees of any size from saplings to giants.
Perhaps we could use jungle or acacia leaves and change the biome of the tree to desert. Im not sure if this will look good, but we can try it. And concerning the dark places in the woods, I'll ask permission to remove some mallorn trees, so there are more clearings, where we can put other trees instead.