Short of editing the code, you could use the tone curve to make an inverse gamma curve. You could plot the curve values using LibreOffice.
rawtherapee gamma.ods (14.0 KB)
gamma-22.rtc (215 Bytes)
gamma-045.rtc (212 Bytes)
Short of editing the code, you could use the tone curve to make an inverse gamma curve. You could plot the curve values using LibreOffice.
rawtherapee gamma.ods (14.0 KB)
gamma-22.rtc (215 Bytes)
gamma-045.rtc (212 Bytes)