BC7 RDO rate distortion curves

I've been tuning the fixed Deflate model in bc7enc_rdo. In this test I varied the # of literal bits from 8 to 14. Higher values push the system to prefer matches vs. literals.

The orange line was yesterday's encoder, all other lines are for today's encoder. Today's encoder has several improvements, such as lazy parsing and mode 6 endpoint match trails. 

(I know this graph is going to be difficult to read on blogger - Google updated it and now images suck. You used to be able to click on images and get a full-res view.)