Pleas add just 1 line of code to the ForgeHooksClient class in the Method afterRenderPass(int pass)
change:
if (handler == null)
{
tess.draw();
}
to
if (handler == null)
{
if(tess.isDrawing)
tess.draw();
}
this would some rendering errors i got, and i saw on google, that many other people also have the same Problem, and if you look over the code,
doing that changes nothing