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opengl renderer - zdepth to png

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Hello all,

I'm currently using opengl renderer to render out a zdepth map quickly. Everything works fine except:

The rendered zdepth map is a value between 0-100 (I believe) - when rendered as exr it's possible to work with it, however, I need to render it out as png as I don't need the extra bit depth for this project and I don't want to render to huge exr files for tens of tohusands of frames.. So for this specific project png wopuld work perfectly..

..however when rendered as png, zdepth is not there any more, only pure black.

Am I missing something here? How should I render the zdepth to png using the opengl renderer in houdini?


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