Tools
Small checks for work in progress. Images you load never leave your browser.
- Proportion gridLay a grid and measuring lines over a reference photo. Check where the eyes, horizon or edges sit against standard rules of thumb.open
- Value squintReduce a photo or a snap of your painting to 3, 5 or 9 tones, and see whether the lights and darks read.open
- Colour mud checkChoose up to four colours and see which pairs are likely to go grey when mixed.open
- Drying timeTypical touch-dry and recoat times by medium, and a time to check again.open
Looking for a cause rather than a measurement? Diagnose by symptom or browse every mistake.