Once the artist begins measuring, erasing, or otherwise improving the drawing, they have ceased to gesture-draw and begun rendering.
wˈʌns ðɪ ˈɑːɹɾɪst bɪɡˈɪnz mˈɛʒɚɹɪŋ, ᵻɹˈeɪsɪŋ, ɔːɹ ˈʌðɚwˌaɪz ɪmpɹˈuːvɪŋ ðə dɹˈɔːɪŋ, ðeɪ hæv sˈiːst tə dʒˈɛstʃɚdɹˈɔː ænd bɪɡˈʌn ɹˈɛndɚɹɪŋ.