cudaGraphicsGLRegisterImage :: allowed formats?

Hi,
(again me and cudaGraphicsGLRegisterImage)

I’d like to know what types are allowed in cudaGraphicsGLRegisterImage.

In http://forums.nvidia.com/index.php?showtopic=164987 we can find few OK formats. But If I want a texture of gray level usable in openGL, which format must I choose ?

I am playing for a long time with all king of format and I can’t achieve a gray level texture…

glTexImage3D(GL_TEXTURE_3D, 0, GL_ALPHA,         512,512,512,       0,  GL_ALPHA, GL_BYTE, myArray); works in opengl but can't be used with cudaGraphicsGLRegisterImage 

Please can you help me !

– pium

Nobody is using cudaGraphicsGLRegisterImage?

Or do I forget something on the doc?
I am lost in all possible texture formats…

– pium

Nobody is using cudaGraphicsGLRegisterImage?

Or do I forget something on the doc?
I am lost in all possible texture formats…

– pium