Indeed. The lighting setup is quite nice in Tesseract. I'm having a lot of fun working with it. Here are some screenshots from a map I'm tinkering with in the engine. https://www.dropbox.com/s/h92frzv99bdkpqh/2013-05-20_13.47.56_complex_coop-edit.jpg…
https://www.dropbox.com/s/uopofok9gwvgslv/Tesseract_2013-05-20.zip Here is a properly setup package. Place the contents of ../Sauerbraten/packages/ into the ../Tesseract/packages/ dir
Binaries: https://www.dropbox.com/s/2htl20tw522a33r/Tesseract_bins_win32-64_2013-05-20.zip Keep in mind none of the old Sauerbraten maps are really setup to work well with new lighting setup in Tesseract.