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Glass plate above an image
http://gimpchat.com/viewtopic.php?f=8&t=18393		 Page 1 of 1
Author:  meetdilip [ Sat May 30, 2020 12:14 pm ]
Post subject:  Glass plate above an image
GIMP Version: 2.10.18
Operating System: Linux
GIMP Experience: Basic Level

List any relevant plug-ins or scripts:
NA

List any ERROR messages you received:
NA


Hi, How do I place a glass surface over a plain colour background ? Something like what Aero did. When I tried with a plain background, the blur simply dissolves into it and show no effect of a glossy surface.

Please see bg + blur try which I did. It does not have any glass effect at all. Do we need to introduce turbulence into the blurred layer ? I don't know how to do it in a uniform way. I tried to do it using brush, which gave very poor results.

Attachments:
glass foreground.png
glass foreground.png [ 215.1 KiB | Viewed 4113 times ]
Author:  oldmangrumpy [ Sat May 30, 2020 3:03 pm ]
Post subject:  Re: Glass plate above an image
I'm not quite sure what you are looking for and I don't know Aero either, but I have been known to play around with glass effects :)

The image below uses a filter to produce various thicknesses of flat glass - the rectangle represents a thin glass layer and the circle a thicker glass layer on top. Let me know if this is what you are aiming for and I will post the filter.

Attachments:
glass_plate.png
glass_plate.png [ 265.22 KiB | Viewed 4081 times ]
Author:  meetdilip [ Sat May 30, 2020 8:45 pm ]
Post subject:  Re: Glass plate above an image
Yes, yes. :)

I would like to imitate the thin layer as we see in the rectangle above. Thanks.

By Aero, I meant Aero in Windows 7. The transparency they used.
Author:  meetdilip [ Sat May 30, 2020 9:14 pm ]
Post subject:  Re: Glass plate above an image
Adding a border method is very effective. I would like to add some blur to it as well. Not a 100 % see-through glass. I tried adding blur to the white layer. But it does not make any effect on the background image. But it works great with a plain colour background.

Any ideas on how to do some glossy glass than a perfectly transparent glass will be awesome. Thanks.

Attachment:
Glass GIMP.png
Glass GIMP.png [ 143.68 KiB | Viewed 4050 times ]
Author:  oldmangrumpy [ Sat May 30, 2020 9:39 pm ]
Post subject:  Re: Glass plate above an image
Meetdilip -OK; a copy of the script is attached below; it is an old one but it does work under 2.10 and it appears under Filters>Kward1979uk>glass.

Here is one of my threads dealing with glossy glass viewtopic.php?f=11&t=13158

Here is a tutorial of mine dealing with clear but contoured glass viewtopic.php?f=23&t=13491&hilit=brumby

Hopefully that will keep you busy for a while.

Attachments:
glass_script_fu_runs_on_2_4_by_kward1979uk.scm [2.91 KiB]
Downloaded 159 times
Author:  meetdilip [ Sat May 30, 2020 10:07 pm ]
Post subject:  Re: Glass plate above an image
Thanks. I tried to figure out from those threads. Tried the first 5 pages on both threads, now I think I don't know much about GIMP. :(
Author:  oldmangrumpy [ Sat May 30, 2020 10:17 pm ]
Post subject:  Re: Glass plate above an image
Meetdilip - if you have any questions or problems ... simple, just ask :)
Author:  meetdilip [ Sat May 30, 2020 11:55 pm ]
Post subject:  Re: Glass plate above an image
Thanks. Please see the wallpaper below. I am trying to replicate it

Image
Author:  Jappaloe63 [ Sun May 31, 2020 1:50 am ]
Post subject:  Re: Glass plate above an image
Thank you for the script. It works in Gimp 2.8 but not in 2.10.18.
Author:  oldmangrumpy [ Sun May 31, 2020 2:02 am ]
Post subject:  Re: Glass plate above an image
jappaloe1963 - I am running 2.10.18 and the script works OK for me.
Author:  oldmangrumpy [ Sun May 31, 2020 5:10 am ]
Post subject:  Re: Glass plate above an image
meetdilip - I was intrigued by your post above (#8) so I had a very quick play at your target wallpaper; no glass, just FG/BG gradient, brushes and blurs.

Attachments:
meetdillip_wallpaper.png
meetdillip_wallpaper.png [ 2.34 MiB | Viewed 1708 times ]
Author:  meetdilip [ Mon Jun 01, 2020 9:20 am ]
Post subject:  Re: Glass plate above an image
You are awesome. I missed this post since this was in page 2. :(

It will be great if you can give some description of how you did it.
Author:  meetdilip [ Mon Jun 01, 2020 9:39 am ]
Post subject:  Re: Glass plate above an image
Your tips were great. I didn't think of a brush stroke with a large brush size in white colour. Once I painted a few soft areas, I applied blur to the white brush stroke layer. Then added a bit opacity to it. The plain gradient wallpaper was in the layer just below it. I used " Luminance " mode on the brush stroke layer which now has blur and opacity.

Luminance works much better than Overlay in this case. HSV value was also looking good.

Attachment:
glass blur brush Luminance.png
glass blur brush Luminance.png [ 746.14 KiB | Viewed 1686 times ]
Author:  oldmangrumpy [ Mon Jun 01, 2020 3:09 pm ]
Post subject:  Re: Glass plate above an image
meetdilip - that's good; I'm no expert in this area, but you can experiment more and use various brush sizes in blurred black or white to get more depth/contouring in your image or use slight variations of the main colours too. As for impact of different blend modes, looks like you are already there. Keep it up :)
Author:  meetdilip [ Mon Jun 01, 2020 8:20 pm ]
Post subject:  Re: Glass plate above an image
Thanks. :)

I was trying to learn this since some time.
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