In the video it doesn't seems so. I mean, 1 ground, 4 walls, and 4 platforms with ramps and bridges. How many triangles is that? Also, that texture you used for the walls isn't the best. It would be great if the DS was higher resolution, but right now it just makes a weird visual effect when you approach them.
Now there's also the angle of the triangles, I believe this determines if it is possible to climb them or if you'll fall back. In the last Bowser level I remember there were some vertical paths you could climb, so I believe there is an option to make steep ground climbable.
There are more triangles in that model than you think. There are actually 1258 triangles. But many of them could be merged together, hence me trying to write a mesh simplification algorithm.
As for the textures, this model is from a SM64 hack. I didn't make it, it was given to me by vinnyboiler. I explained that in the video's description. (note to self: when posting a video on the forum, always post the description along with it)
And for the climbable slopes... I believe that's a particular collision behavior.
QUOTE(YoshiInAVoid @ Jun 14 2011, 07:22 AM) May already have been asked, but I can't be bothered to read 16-pages... Is the source code available?