Lightroom 6: Slideshow quality in full screen terrible compared to Library fullscreen (F key)

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  • Problem
  • Updated 8 months ago
  • (Edited)

Even with 1:1 previews rendered before playing the slideshow in full screen (high quality), pictures are totally soft compared to fullscreen previews hitting the F key.

The only way to get a sharp image in slideshow is to export a sharpened screen-sized jpeg automatically added to the catalog and then play a slideshow with those jpegs. But then the colors are off regardless of the embedded profile (sRGB, ProPhoto...). Even apple Preview will render a sharp and correctly color-managed screen-sized image from a 20 Mpx file...

This started to happen in LR5 but I don't remember which version of it for sure. It's still the same in 6.7.

Am I facing a bug due to my rather old hardware, or is the Slideshow module basically useless with raw images for everyone?

LR 6.7 and El Capitan (clean install) on MacBook pro 5.2 with dual GPU GeForce 9600M GT /GeForce 9400M (unsupported by LR6.7)


Phil

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Philippe Chassot

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Posted 2 years ago

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Smit Keniya, Employee

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Hi Philippe,

Thanks for reporting this. We will try to reproduce this in-house and get back to you with updates.

Thanks,
Smit Keniya
Adobe Lightroom Team
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Smit Keniya, Employee

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Hi Philippe,

Could you share a screenshot or a screen video recording for this?

Thanks,
Smit Keniya
Adobe Lightroom Team
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Philippe Chassot

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Thanks for taking time. It would be great if we can to the bottom of this.
Here are some screen (1920x1200) grabs for comparison. 1:1 preview was rendered and standard preview is set to screen size high quality.

21Mpx cropped to 1881x2821
1.Full screen (F key) in Library module (not zoomed to 1:1)

2.Full screen (slideshow play; not zoomed to fill; quality high)


21Mpx cropped to 1881x2821 exported 1:1 as jpeg 100, no sharpening, sRGB
3.Full screen rendered by apple preview


21Mpx cropped to 1881x2821 exported to 773x1160 as jpeg 100, sharpening for screen high, sRGB
4. Full screen (slideshow play; not zoomed to fill; quality high)


I understand that full screen rendering in the library (1) applies average sharpening. What I don't get is why the slideshow would render images that are so soft, even with quality set to high. In fact there seems to be almost no difference between the 3 quality settings. 
Am I doing something wrong? trying to use slideshow to do something it wasn't meant for? 
Any help very welcome!
Thank you.
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Smit Keniya, Employee

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Hi Philippe,

Thanks for share the Screenshots. I can see the difference in the screenshots you have shared. I will try to reproduce this.

Thanks,
Smit Keniya
Adobe Lightroom Team
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Philippe Chassot

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Thank you Smit, I'll be glad to see what you find out.
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Smit Keniya, Employee

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Hi Philippe,

We have tried reproducing this issue on our end and we have not been able to reproduce this.

Could you share the image you have shared as an example? We would like to try to reproduce this with that image.

Thanks,
Smit Keniya
Adobe Lightroom Team.
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Philippe Chassot

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Hello,
Thanks for trying. I also tried on my side with a macbook pro 2012 with different GPUs than mine: same results. In summary: the slideshow module can only be used with images that require absolutely no resizing. Looking through the web, posts about the same issue either die out unresolved or conclude that this is normal behavior. Anyway, here is a link to the original bird picture if you want to check it out.
https://dl.dropboxusercontent.com/u/62930480/slideshow.zip
Best regards,
Philippe
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Smit Keniya, Employee

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Thanks, Philippe.

I will try with this image and get back to you.

Meanwhile, could you try after disabling Use Graphics Processor from Preferences-->Performance. Let me know if this helps.

Thanks,
Smit
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Philippe Chassot

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Ok, thanks.
I tried with GPU on/off on both computers. No difference.
Regards,
Phil
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Smit Keniya, Employee

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Hi Philippe,

I have tried to reproduce this on our side with your image as well and was not able to.

Are you seeing all the time for all the images?

Thanks,
Smit Keniya
(Edited)
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Antonio Chrysostomou

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Just want to support the original post here - I see the same problem and we cannot be the only ones. Instead of telling people that you cannot reproduce their problem - which doesn't solve the problem by the way - tell us what you are doing that you get sharp images in your LR slideshows, as sharp as with full screen preview or in the loupe view. This has been frustrating me for a very long time.
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Magnus Wilson

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Hi,
I also have the same problem with very poor slideshow IQ when generated from RAW files (using JPGs seems to work better). I use the High quality rendering setting in the slideshow, but noop...the output looks like a medium quality picture and most blue skies are even "banded" in the slideshow. It looks really bad, however, perfect quality when developing RAW and viewing in Loupe etc. I run dual 2560*1440 screens with RAW sizes up to 7952 x 5304.

I thought I would update from LR4 to latest since I upgraded my camera and lenses to full-frame (and will start to shot RAW only), so I started using a trial license. Now I'm hesitating, since this seems to be a long lasting bug (in LR4 the slideshow works perfectly using JPGs). Will there be similar bugs when exporting to JPG as well (I did a quick test and it seems to be good quality JPEGs)?  /Magnus

Lightroom version: CC 2015.12 [ 1125239 ]
License: Trial
Operating system: Windows 10
Version: 10.0
Application architecture: x64
System architecture: x64
Logical processor count: 8
Processor speed: 4,0 GHz
Built-in memory: 16236,1 MB
Real memory available to Lightroom: 16236,1 MB
Real memory used by Lightroom: 4850,5 MB (29,8%)
Virtual memory used by Lightroom: 6686,6 MB
GDI objects count: 1381
USER objects count: 4973
Process handles count: 2942
Memory cache size: 3273,6MB / 3828,5MB (85,5%)
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 4559MB / 8118MB (56%)
System DPI setting: 96 DPI
Desktop composition enabled: Yes
Displays: 1) 2560x1440, 2) 2560x1440
Input types: Multitouch: No, Integrated touch: No, Integrated pen: Yes, External touch: No, External pen: Yes, Keyboard: No

Graphics Processor Info:
GeForce GTX 770/PCIe/SSE2

Check OpenGL support: Passed
Vendor: NVIDIA Corporation
Version: 3.3.0 NVIDIA 376.53
Renderer: GeForce GTX 770/PCIe/SSE2
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AudioDeviceIOBlockSize: 2048
AudioDeviceName: Speakers (ASUS Xonar Essence STX Audio Device)
AudioDeviceNumberOfChannels: 2
AudioDeviceSampleRate: 96000
Build: LR5x8
Direct2DEnabled: false
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GL_ACCUM_BLUE_BITS: 16
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GL_RENDERER: GeForce GTX 770/PCIe/SSE2
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