Write Z-map into part of alpha channel

Coding Python Support
1

Hi BlenderArtists,

I’m working on an isometric game where 2d sprites can be partially masked by each other

For game optimization purposes, i’d like to save my mesh’s Z-map into its sprite’s alpha channel, but as I also would like to keep antialiasing informations, i’m searching how to make those infos coexist in a single channel

(I only need a small resolution for z, i guess 2 bits would be precise enough)

Did you ever heard about a similar approach ?
Would you advise me to re-encode those maps after the rendering process or is there any technics to reroute blender’s rendering engine to do so ? (I’m still new to Python)

I’d be grateful for any advice, thanks

Loupv

2

Nevermind, i’ll go for an other solution with two separate sprites…

3

If you ever come back to this, I suggest you take a look at the compositor. It is easy to remap some 2D information, like a Z map, to the final image’s alpha channel. Probably better than doing it in Python.