4.19 Physical Lights

[Maximum-Dev]

@rosegoldslugs

1/125, ƒ16, and ISO 100 is closer to EV15. With a pure white card, fully rough facing up, I increased the sky brightness until the card read about 25,000 Lux. I increase the sun to about 135000 Lux, bringing the final card reading to 125,000 Lux. With these settings, the previous values work well(also pretty close to perfect exposure for 18% gray), but EV16 is pretty dark, but if we follow typical EV measurements, EV16 is mainly for bright subjects on snow or sand, which explains why it’s much darker than we expect. EV15, for 1/125, ƒ16, at ISO100 should look correct provided the intensities are all accurate and your materials are in the proper range.

Try raising your sun angle to be more in line with a mid-day angle and increase the intensity. Also try measuring a white card with the Pixel Inspector. My sun at 135000 is only about 99,000 Lux, so that’s probably why it looks so dark to you.

I have several questions but, how do you measure the surface illuminance? I don’t see such option in pixel inspector nor HDR visualizer.

@A-J-K

Are you using a custom skydome ? If so, you also need to crank up the brightness multiplayer of your HDRI.

I do, I just had hidden it in that picture. Wondering about how to measure surface illuminance though.