reserve texture coordinates before building the mesh, plus a couple simplifications after recent API tweaks.
reserve texture coordinates before building the mesh, plus a couple simplifications after recent API tweaks.

aytekaman/appleseed,dictoon/appleseed,Biart95/appleseed,Aakash1312/appleseed,gospodnetic/appleseed,est77/appleseed,Aakash1312/appleseed,luisbarrancos/appleseed,Vertexwahn/appleseed,luisbarrancos/appleseed,aiivashchenko/appleseed,luisbarrancos/appleseed,appleseedhq/appleseed,docwhite/appleseed,aytekaman/appleseed,dictoon/appleseed,gospodnetic/appleseed,appleseedhq/appleseed,Biart95/appleseed,docwhite/appleseed,glebmish/appleseed,aytekaman/appleseed,pjessesco/appleseed,pjessesco/appleseed,aiivashchenko/appleseed,aiivashchenko/appleseed,dictoon/appleseed,Aakash1312/appleseed,est77/appleseed,pjessesco/appleseed,Vertexwahn/appleseed,pjessesco/appleseed,aytekaman/appleseed,docwhite/appleseed,Vertexwahn/appleseed,luisbarrancos/appleseed,gospodnetic/appleseed,glebmish/appleseed,Biart95/appleseed,gospodnetic/appleseed,est77/appleseed,glebmish/appleseed,est77/appleseed,luisbarrancos/appleseed,Biart95/appleseed,Aakash1312/appleseed,appleseedhq/appleseed,Vertexwahn/appleseed,glebmish/appleseed,Vertexwahn/appleseed,docwhite/appleseed,aiivashchenko/appleseed,docwhite/appleseed,gospodnetic/appleseed,Biart95/appleseed,Aakash1312/appleseed,glebmish/appleseed,dictoon/appleseed,pjessesco/appleseed,est77/appleseed,appleseedhq/appleseed,aytekaman/appleseed,aiivashchenko/appleseed,appleseedhq/appleseed,dictoon/appleseed