Dual Layering textures for an iphone scene?

iamtravis316

I am trying to set up a scene with a dual texture layer, as the character moves over the first layer anywhere he/she has touched becomes transparent showing the layer underneath. So foot steps for example, wherever they step, you'd see a foot print. Or a snowmobile, wherever the snowmobile went the tracks would show.

Can this be achieved for an iPhone game scene? If so, what would the best practice be for the texture side of it, not the coding?

Slum

You'd be best spawning decals (small quads or quad strips that sit on top of the ground).

iamtravis316

Thanks Slum,
do you think you could explain a bit more, because I don't quite understand what you mean.

Enlighter

Slum,

That would be ideal for foot steps but what about tracks like from a snowmobile or a car or something...

He meant floating poly's that would spawn when a player stepped etc. I think...

oobersli

the snowmobile and car would be the same I'd think... but instead of individual planes for feet the you'd have tileable planes generated continously behind each wheel or snowmobile tread.