i needed some help in d3d im. i am developing a real time strategy game in vc++ & dx7 im. My QUESTION => how do i pick objects in 3d space from 2d mouse coords?? is there someway of stealing it from the rasterizer or one of the world,view or proj matrices or should i write my own ray picking routine?? if i have to write my own ray pickin routine how in the world do i do it??? pleasee help!! i''ll be really greatful are there any samples on the web related to this?? please specify the URL if so? (Would be great if u give me a detailed reply) thnx a lot!! sandeep_kl@mailcity.com