GIMP Version: 2.8.14
Operating System: Windows
OS Version: 8.1
GIMP Experience: New User

---

I am trying to add the rippling effect to an image I created. The image I created has no background. The background is set to transparent. Whenever I try to apply the animation it makes many frames and applies the effect which is what I am looking for. However, it adds a gray background to every single frame. I have tried looking for a solution but have been unsuccessful. I ran into something that said to go to the script file and edit it with notepad it said to change RGB to RGB-IMAGE but instructions were not very clear and the pictures showing where in the code to make the change had been removed. I took my best guess as to where in the code to make the change and I got an error the next time I tried to run the rippling animation effect. I was able to return the script to its original and it is working as usual except it is still adding the gray background to my transparent gif. Your help will be greatly appreciated.

Thanks in advance!

Hello robzilla, welcome to GimpChat.

At the top of your gimp, click where it says image Mode RGB. If RGB isn't selected, put a dot beside it and see if this helps.

If the script you're referring to is ripply-anim.scm by Adam D. Moss, I think the amendment you were advised to make is to this line:


But I think it should actually be RGBA-IMAGE, not RGB-IMAGE.

Molly, Thank you for your reply. My Gimp is already set to image Mode RGB.

Jontait2, thanks for the welcome and, do I make the change where it says width height RGB to width height RGBA-IMAGE?

By the way, does anyone know who Adam D. Moss is? If so, can he be contacted?

Thanks again.

I did try to change the RGB to RGBA-IMAGE and when I tried to run the script I got an error that says: Error: (: 1) eval: unbound variable: A-IMAGE

I would consider asking Ingo Lütkebohle at the GIMP Plugin Registry about contacting Adam D. Moss.

@robzilla
This version will automatically set the output image and the layers therein to the same image/layer modes as the input image:

Just save to your personal scripts folder.

Note that I've changed the name in the Gimp menu to "Rippling...(JThack1)" so this hacked version does not get mixed-up with official releases (especially since this is one of Gimp's "official" scripts distributed with Gimp packages).

Also note that you may get nasty edge effects unless you set the "Edge behavior" parameter to "Black/transparent".

I'm going to report the image mode problem as a bug, so there should eventually be a new official release of this script.

The original advice to modify the script seems to have been this thread on GimpTalk:
http://www.gimptalk.com/index.php?/topi ... on-ripple/

Reported as a bug:
https://bugzilla.gnome.org/show_bug.cgi?id=748270

Yes, that would solve robzilla's immediate problem, but it would mean that all output frame layers would have alpha channels irrespective of whether the input did or not, which is unnecessarily wasteful and can use up a lot of memory on a long animation.

The way I have coded it (and as I've submitted in my bugzilla report), the script will generate the output image and frame layers therein with only the color level actually required:
- if you start with a GRAY image and the active layer therein does not have an alpha channel, the output image will be of type GRAY and all the frame layers therein will not have alpha channels;
- if you start with a GRAY image and the active layer therein does have an alpha channel, the output image will be of type GRAY and all the frame layers therein will have alpha channels;
- and so on;
..which is how it should have been coded in the first place!

It will probably be requested that you provide a patch for the fix, rather than a complete replacement script. While doing so is a pain (often requiring more effort to create the patch than to fix the script), it provides a clear way to see what you are changing, for both the devs who examine your fix and for the maintenance logs.

Agreed, done.
See post #9 above.

You were right!
Patch supplied.

Sounds like you need Saul Goode's Combine/Overlay Background script:
http://gimpscripts.com/2011/10/combineo ... ackground/

Just create your objects on separate layers (flames uppermost), run the ripply-anim script on the upper layer and then run:
FX-Foundry>Animation>Combine with background
This will add the lower layer (the semicircle) as background in every frame of the animation.

[ BTW please post replies in the public forum rather than sending me PMs (unless really necessary) - that way everyone gets to see the ongoing dialogue and can jump in and contribute if they so wish. ]

The bug has been fixed in master development branch.

That mitch accepted a total re-write of the script was entirely unexpected.

Well done Saul.