Spellforce 2 Demons of the Past

Spell­force 2 was released in 2006 and will be 8 years old by april. Nev­er­the­less, the third add-on of the series shipped a month ago. Talk about a long sell­er!

Of course I’m attached to SF2 because I wrote many parts of its engine back then. This time I was briefly involved to help the devel­op­ers include my attribute-less nor­mal map algo­rithm. The orig­i­nal SF2 did not have any nor­mal maps, and there­fore none of the orig­i­nal art assets comes with tan­gent space infor­ma­tion. This is an ide­al sce­nario to pimp up the visu­als with­out touch­ing the geom­e­try, sim­ply by mak­ing a shad­er change and adding nor­mal maps. Con­tin­ue read­ing

Followup: Normal Mapping Without Precomputed Tangents

This post is a fol­low-up to my 2006 ShaderX5 arti­cle [4] about nor­mal map­ping with­out a pre-com­put­ed tan­gent basis. In the time since then I have refined this tech­nique with lessons learned in real life. For those unfa­mil­iar with the top­ic, the moti­va­tion was to con­struct the tan­gent frame on the fly in the pix­el shad­er, which iron­i­cal­ly is the exact oppo­site of the moti­va­tion from [2]:

Since it is not 1997 any­more, doing the tan­gent space on-the-fly has some poten­tial ben­e­fits, such as reduced com­plex­i­ty of asset tools, per-ver­tex band­width and stor­age, attribute inter­po­la­tors, trans­form work for skinned mesh­es and last but not least, the pos­si­bil­i­ty to apply nor­mal maps to any pro­ce­du­ral­ly gen­er­at­ed tex­ture coor­di­nates or non-lin­ear defor­ma­tions. Con­tin­ue read­ing