Opened 4 years ago

Closed 3 weeks ago

#12597 closed defect (wontfix)

BACKENDS: 3DS: MOHAWK: Checkerboard pattern on lower screen in non-video scenes

Reported by: BallM4788 Owned by: ccawley2011
Priority: low Component: Port: 3DS
Version: Keywords: 3ds, n3ds, mohawk, riven
Cc: Game: Riven

Description (last modified by BallM4788)

Platform: New Nintendo 3DS
ScummVM version: commit 78ec256
Description: In Riven, non-video scenes have a faint checkerboard pattern on the lower screen. In scenes where video only occupies a portion of the screen, the video portion will appear normal while the rest of the screen will have the checkerboard pattern. The upper screen never displays checkerboarding. Have not tested with Myst or Myst Masterpiece Edition, but they might have this same issue as well.
Replication: Enter any scene with either no or partial video.

Attachments (4)

No video, bottom.bmp (225.1 KB ) - added by BallM4788 4 years ago.
No video, top.bmp (562.6 KB ) - added by BallM4788 4 years ago.
Partial video, bottom.bmp (225.1 KB ) - added by BallM4788 4 years ago.
Partial video, top.bmp (562.6 KB ) - added by BallM4788 4 years ago.

Download all attachments as: .zip

Change History (9)

by BallM4788, 4 years ago

Attachment: No video, bottom.bmp added

by BallM4788, 4 years ago

Attachment: No video, top.bmp added

by BallM4788, 4 years ago

Attachment: Partial video, bottom.bmp added

by BallM4788, 4 years ago

Attachment: Partial video, top.bmp added

comment:1 by BallM4788, 4 years ago

Description: modified (diff)

comment:2 by BallM4788, 4 years ago

Description: modified (diff)

comment:3 by BallM4788, 4 years ago

Priority: normallow

comment:4 by sev-, 5 weeks ago

Summary: 3DS, MOHAWK: Checkerboard pattern on lower screen in non-video scenesBACKENDS: 3DS: MOHAWK: Checkerboard pattern on lower screen in non-video scenes

comment:5 by ccawley2011, 3 weeks ago

Component: Engine: MohawkPort: 3DS
Owner: set to ccawley2011
Resolution: wontfix
Status: newclosed

I think this is an inherent issue when performing nearest neighbour downscaling when the source image has previously been dithered. Turning on filtering in the options menu helps to mitigate this issue, but beyond that I don't think there's much that can be done about it.

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