Fabric Dynamics in Realtime.

Smirnoffka

I just purchased Rockstars table tennis on the XBOX and was blown away by its graphics, as I have only had the console since christmas. What I was really wondering is how do they make such believable fabric work like that in realtime, as well as getting the Normal Maps to look right when the shirt is deformed. How many polygons do these shirts have? I am assuming that the actual animations are done with the physics engine. Any insight into this, as I am very interested in how it is done.

Joao Sapiro

i believe that they used like 5 normal maps and for example when they bend the arms they use one , when they are still they use another, i believe its that way . i actual never thought anyonewould implement that system !

Vitor

On cinema industry, i read somewhere that they did the same with different displacement maps (one with contracted muscles, with bigger veins and so), i guess that is just the same thing but reduced to meet realtime needs.

Eric Chadwick

Not that hard to blend bump maps, you could even blend one in per-vertex if your code supported it, like the left sleeve gets wrinkled in a certain pose. Gonna have to check out that game.

Taron did some interesting work blending displacements together, worth a look. http://www.taron.de/