看到一個 demo 展示瀏覽器內 CSS 的處理能力，看起來已經足夠到可以處理不少貼圖與光線效果的部分了：「CSS FPS」。
This is demo of a CSS powered 3D environment. Geometry is created with HTML elements and CSS transforms. Textures and lightmaps are composed by layering multiple background-images and colour is applied using CSS blend-modes.
不過遊戲應該會需要更多種類的效果，這部份目前應該還是得靠 javascript 來產生... (如果要在瀏覽器裡面跑)