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How to adjust exposure for Daz camera without tone mapping?

onyxlee_9b3cce7f35onyxlee_9b3cce7f35 Posts: 70
in Daz Studio Discussion

Hi guys, I realized that the native cameras inside Daz Studio are not physical cameras, so you can't adjust its exposure compensation (EV). The only way to adjust the image brightness without changing the light power is to use exposure in tone mapping in the render settings, then the problem is, any tone mapping settings are ignored in the canvases EXR output. By default, exposure in tone mapping is set to 13. which means the EXR output is ALWAYS too bright. They always look like this. See attachment.

Right now, there's no exposure time or ISO in the camera settings (although you can find them under tone mapping, but they are ignored in the canvases render output.) So we always have to manually adjust the exposure in Photoshop. Is it possible to move these settings into the cameras?

Thank you so much!

 

 

Comments

  • Richard HaseltineRichard Haseltine Posts: 108,072

    I think the usual advice is to turn Tone Mapping off.

  • onyxlee_9b3cce7f35onyxlee_9b3cce7f35 Posts: 70
    edited August 2020

    Thank you, so by turning off tone mapping, you mean we can't adjust camera settings, we can only tweak lighting?

    Also, I tried your approach, the exposure of the renders are acceptable, but I found another issue, when I opened both the EXR(32bit) and PNG (8bit) both in Photoshop, the EXR version looks paler than the PNG version, as if they have different gamma value. I have to change the gamma value of the EXR to 0.5 in order to get exactly the same look as shown in the render result.

    I mean, once we figure out the differences, we can all fix them manually. It's just all these extra steps that don't make sense. Who would have thought the camera can't control exposure, and exr has a different gamma...

    Post edited by onyxlee_9b3cce7f35 on
  • Richard HaseltineRichard Haseltine Posts: 108,072
    onyxlee_9b3cce7f35 said:

    Thank you, so by turning off tone mapping, you mean we can't adjust camera settings, we can only tweak lighting?

    Also, I tried your approach, the exposure of the renders are acceptable, but I found another issue, when I opened both the EXR(32bit) and PNG (8bit) both in Photoshop, the EXR version looks paler than the PNG version, as if they have different gamma value. I have to change the gamma value of the EXR to 0.5 in order to get exactly the same look as shown in the render result.

    I mean, once we figure out the differences, we can all fix them manually. It's just all these extra steps that don't make sense. Who would have thought the camera can't control exposure, and exr has a different gamma...

    The gamma difference may be down to assumptions Photoshop makes about certain file types.

  • onyxlee_9b3cce7f35onyxlee_9b3cce7f35 Posts: 70

    I just opened the EXR and JPG side by side, this time EXR was opened in PD Player. It seems like the same, EXR version is brighter and flatter than the JPG version. I guess the gamma value indeed differs.

    pdplayer64_YVu0hn5TC5.jpg
    885 x 365 - 25K
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