Sometimes an ascii entry will have a png render, sometimes not. But there isn't an upload render button. I wonder how these are generated, and why they only seem to exist for a portion of ascii entries? (I'd gladly render a bunch if it were possible to upload them!)

I did a quick analysis of this battle btw:
http://battleofthebits.com/arena/OHC/1797/

And there doesn't seem to be a correlation between the exact file type (e.g. CR vs CR+LF, is it unicode, etc) and whether a render appears.

I remember making and uploading my own ascii render for http://battleofthebits.com/arena/Entry/landscape/20873/ so maybe at some point the upload button disappeared for ascii.

Might be the same case for ansi format too.

Honestly, I can't remember how any of it works w/o digging in the code.