Reported on the forum. Lit material on HDRP output alpha differently if set to Transparent and blending mode to premultiply.

[https://forum.unity.com/threads/recorder-premultiplied-alpha-bug-png-and-exr.1195888/#post-7645183]

Reproduction Steps: 

• Open repro project
• Add a image sequence recorder with the source set to Targeted camera
• Set the file format to png and enable include alpha
• Start recording

Current result: 

• Alpha output is not the same

Expected result 

• Alpha should be the same between what we see in game view and the recording.

Game view

!image-2021-11-17-13-09-11-231.png|width=361,height=329!

Recorder output

!Image Sequence_013_0000.png|width=387,height=232!