This is basically the need of my shadow mapping project. Since I only need the depth information, it’s a waste to use all 3 channels. And to accommodate point light, I need to render to a cubemap. Is there any method to render to single channel float buffer which can be binded to a cubemap texture afterwards? If so, whats the key parameter when creating the pbuffer and the texture? Thanks.
BTW, I’m using ATI_texture_float for now.