How to eliminate color banding ?

Q&A about the latest versions
Post Reply
JezUK
Posts: 71
Joined: Tue Dec 03, 2013 6:13 pm
Location: England
Contact:

Thu Jul 23, 2020 12:53 pm

I'm setting up another 3D interior scene, my PNGs are 10000x5000 pixels big (I have three) and those are imported into Pano2VR.

The output is 96Mb big (with those 3 images via hotspots) - but I've got really unattractive banding on my ceilings.

I believe I've set everything up for Maximum Quality, so please can you tell me how to improve the images within my VR scene, by eliminating that banding (that isn't there at all in the PNG files) ?

Thanks.
User avatar
thomas
Chief Gnome
Posts: 2564
Joined: Fri Sep 01, 2006 3:56 pm
Location: Vienna, Austria
Contact:

Thu Jul 23, 2020 1:45 pm

You can add some noise in Photoshop to the areas where the banding happens.
MfG, Thomas
Branigan
Posts: 228
Joined: Tue May 19, 2020 3:43 pm

Mon Jul 27, 2020 3:18 pm

JezUK wrote:
Thu Jul 23, 2020 12:53 pm
I'm setting up another 3D interior scene, my PNGs are 10000x5000 pixels big (I have three) and those are imported into Pano2VR.

The output is 96Mb big (with those 3 images via hotspots) - but I've got really unattractive banding on my ceilings.

I believe I've set everything up for Maximum Quality, so please can you tell me how to improve the images within my VR scene, by eliminating that banding (that isn't there at all in the PNG files) ?

Thanks.
Hmmmm... apparently the official solution is "Tough luck mate, use another program to fix the problems caused by Pano2VR". :roll:

Have you tried playing with any of the other image export filters, as for some reason several of the 'default' settings throughout this program immediately need changing to something more useful.
.
settings.jpg
settings.jpg (170.67 KiB) Viewed 279 times
Neal
Posts: 177
Joined: Thu Dec 12, 2013 11:14 am
Contact:

Mon Jul 27, 2020 4:47 pm

Can you post a link so we can see what you are seeing?
Branigan
Posts: 228
Joined: Tue May 19, 2020 3:43 pm

Thu Jul 30, 2020 12:43 pm

JezUK wrote:
Thu Jul 23, 2020 12:53 pm
I believe I've set everything up for Maximum Quality, so please can you tell me how to improve the images within my VR scene, by eliminating that banding (that isn't there at all in the PNG files) ?
Having just realised that the blurry, lower contrast images in Pano2VR are (partly) caused by the Player Pano2vr_player.js compressing the RGB ranges from 0-255 to 15-255; then you've got a smaller range of RGB values to work with, which is going to cause some banding in similar colours. Also some potential weird tints appearing too.

Not a lot you can do there, other than to precompress your initial panoramic image Levels to that 15-255 range, see if you can touch them up to look acceptable like that, then re-expand them to 0-255 and hope that when they're re-reduced to 15-255 in the Pano2VR Viewer, they look about the same as before.

They don't get 'converted' to 15-255 when the tiles are created, only when viewed.
Post Reply