Sadly the 3D release of Avengers Endgame did not come with any opened up IMAX scenes so I have used the Russian Open Matte stream, that has more image on the top and bottom compared to the 2160p WEB-DL, as the main source of this release.
One definate advantage this Open Matte version has over the other Marvel IMAX releases based off the 3D blu-rays is that it does not have the left sidebar changing width from shot to shot.
2160p WEB-DL 1:
http://extraimage.net/images/2019/08/30/7d94fad5c4c6adeaf5a473b647d61a08.jpg
Regraded 1:
http://extraimage.net/images/2019/08/30/347bffc390ad74389b06fd4ea648a67b.jpg
2160p WEB-DL 2:
http://extraimage.net/images/2019/08/30/10eeaa6e363b878df0109ee9a701e25a.jpg
Regraded 2:
http://extraimage.net/images/2019/08/30/fb8505e6c5b43e4181e12e22a0ad63eb.jpg
2160p WEB-DL 3:
http://extraimage.net/images/2019/08/30/c19f181f1c4e262fc92ce499286c57d1.jpg
Regraded 3:
http://extraimage.net/images/2019/08/30/04ad034531b9748b3c87264b805e4a74.jpg
2160p WEB-DL 4:
http://extraimage.net/images/2019/08/30/8e018d37d96bb3c6a58f40b7102973cc.jpg
Regraded 4:
http://extraimage.net/images/2019/08/30/ed53f75f303737d290b2c6cd0170a390.jpg
2160p WEB-DL 5:
http://extraimage.net/images/2019/08/30/d8f0c9347d55eece0ec791f62a465acd.jpg
Regraded 5:
http://extraimage.net/images/2019/08/30/5144e33b1bbba9b653a73eadab4b5d8f.jpg
Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : [email protected] Format settings, CABAC : Yes Format settings, RefFrames : 4 frames Codec ID : V_MPEG4/ISO/AVC Duration : 3 h 1 min Bit rate mode : Variable Bit rate : 9 000 kb/s Maximum bit rate : 14.0 Mb/s Width : 1 920 pixels Height : 1 080 pixels
Audio ID : 2 Format : E-AC-3 Format/Info : Enhanced Audio Coding 3 Format profile : E-AC-3+Atmos / E-AC-3 Format settings, Endianness : Big Codec ID : A_EAC3 Duration : 3 h 1 min Bit rate mode : Constant Bit rate : 640 kb/s Channel(s) : 15 objects / 6 channels Channel positions : 15 objects / Front: L C R, Side: L R, LFE Sampling rate : 48.0 kHz Frame rate : 187.500 FPS (256 SPF) Compression mode : Lossy Stream size : 832 MiB (7%) Language : English Service kind : Complete Main Default : Yes Forced : No