The rendering is suddenly coming out dark

[jeung_shion]

The rendering is suddenly coming out dark
What is wrong? (The setting is the same)

The version I use is vray for maya 2020 / vray 5

[hermit.crab]

It's hard to say without a scene. What do you mean by suddenly?

[jeung_shion]

After setting up animation frames 1-350
Rendering with render sequence successfully.

It came out normally from 1-70.
After stopping rendering for a while,
Rendering has been successfully invoked.
71-350 on the render sequence
It suddenly comes out dark from frame 71.

Other than the frame setting, the settings are the same.

How do I get it to come out normally?

[hermit.crab]

Best you send a simplified version of the scene (only one object exhibiting the issue should be fine) so we can troubleshoot.

[seandunderdale]

have you got auto exposure turned on?

[jeung_shion]

I'm using V-ray's physical camera

[seandunderdale]

I was referring to the auto-exposure feature in render settings - overrides tab - Auto Exposure. If that is on, and you render one frame, stop the render, render another frame, you'll likely get different exposure results.