Hum, yes, it would be a lot more complicated ...
I don't know if you can apply camera space coordinates instead of world space coordinates but if you can, here is how you should do :
1- Set for the 1st texture level world space coordinates
2- Set your object texture on the 1st level
3- Set for the 2nd texture level camera space coordinates
4- Set your hologram texture (a simple scanline texture would be ok)
5- Multiply the first level with the second, so that every times the scanline is black the texture disappear
6- Set alpha-blending on
It appears to be simple, but I guess you'll have to work on it because it won't do the good result the first time ^^ (I think )
But this is the way I would have done it
Hope that helped!
Bye
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