mesh_leaf_base and mesh_stem_base changed uv orientation?

[steve3d]

in previous version, Unigine-20110117, my speedtree intergration works correctly, but today, I ported those patches to Unigine-20110228, I found both my stem and leaf material are wrong, whatever settings I used in SpeedTree Compiler, it alwasys use the same wrong texture orientation. Finally, I changed the mesh generation code to

vertex[num_vertex+j].texcoord[0] = lod->m_pTexCoordsDiffuse[j*2];
vertex[num_vertex+j].texcoord[1] = 1.0f - lod->m_pTexCoordsDiffuse[j*2+1];

 

I flipped the V orientation, then all the existing model works correctly. Is this a intended change in mesh_stem/leaf_base shader?

 

I also tried with CCore->SetTextureFlip(true/false), it always use the same wrong orientation.