Testing this with a simple sliding door. On frame 1 the door is closed. On frame 12, the door is offset 45 pixels to the right. Frames 2 through 11 are empty. I select the 12 frames, and create a straight tween. The result is that it creates frames 2 through 11 in which the image moves 2 pixels per frame, which is obviously not enough. I'm not sure what I'm missing.
Hi werzaque, thanks for the detailed explanation. The setup you described is actually correct. It should read the cel in Frame 1, read the cel in Frame 12 (offset 45px), and generate proper in-between frames that smoothly interpolate the movement.
Since I’m currently away from my computer, I can’t test this exact case right now, but based on recent reports from other users, this behavior may be related to Aseprite version changes.
Tweencel was developed and tested on Aseprite v1.3.14-beta1, and some changes introduced in v1.3.15 may affect how cel positions are read by scripts. If you’re on 1.3.15 or higher, this could explain why the interpolation is incorrect.
When I get back to my machine, I’ll test your exact scenario and update Tweencel if needed.
In the meantime, could you let me know which version of Aseprite you’re using? That will help me confirm whether it’s a version-related issue.
Thanks again for reporting this, your feedback is a huge help.
Hi Werzaque, I tested your exact setup on my end using both Aseprite v1.3.15.5 and Aseprite v1.3.14-beta1 to confirm, and Tweencel is generating the correct in-between frames.
Here’s the setup I used:
12 frames total
Frame 1: door image (closed)
Frames 2–11: empty
Frame 12: same door image moved +45px to the right
Applied Position Straight Tween → Hit "Create" button
The tween interpolated the movement correctly from Frame 1 to Frame 12.
Thanks for the reply. Hmmm... can't see to view your GIF. But in any case, I got it to work when I kept the selection marquee turned on (instead of pressing Esc to deselect after copying it to frame 12) and in that case it did work.
EDIT: I'm trying again today and it works now exactly as advertised and I can't seem to reproduce my earlier problem... Will report again if I bump into it, but maybe I didn't reboot Aseprite after loading your script. Not sure if that makes sense but...
Hi, I have a problem with all the color tweens ( Hue,Saturation etc), it doesn't seem to create the inbetweens, here's an example I recorded : https://postimg.cc/RJRcYybY
Hi Chroniker99, thanks a lot for sharing the report and the video! 🙏
This might be related to how Aseprite handles color data between frames.
I’ve tested Tweencel on Aseprite v1.3.14-beta1, so knowing your version will help me check if it’s a compatibility issue. Could you let me know which version you’re using? I’ll try to reproduce it on my end and see what’s causing it.
I just installed the latest Aseprite update (v1.3.15.4) and was able to reproduce the issue , it seems there’s a compatibility problem with the color tweening. Rest assured, I’ll release an update soon to fix it. 👍
Hi Chroniker99, thank you for your patience and understanding. I wanted to let you know that I’ve created and uploaded a new patch update for Tweencel (v2.2.2) to address the color tweening issue on the latest version of Aseprite (v1.3.15).
You can now download the updated version, and it should work smoothly with the new Aseprite release.
alpha tweening not working. it doesnt create the inbetweens and when tweaking the bar its laggish and stuck. also if you crank it up or down it deforms the layer
The lag or “stuck” feeling when adjusting the alpha bar happens because the slider directly updates and applies the image alpha in real time. I recommend clicking along the slider instead of dragging it to quickly jump to your desired value.
Also, unchecking “Tween Alpha” will undo the alpha changes on the currently selected cel image.
Hi Nohazure, I just installed the latest Aseprite update (v1.3.15.4) today and was able to reproduce the issue, it seems there’s a compatibility problem with the color tweening. Rest assured, I’ll release an update soon to fix it. 👍
Hi Nohazure, thank you for your patience and understanding. I wanted to let you know that I’ve created and uploaded a new patch update for Tweencel (v2.2.2) to address the color tweening issue on the latest version of Aseprite (v1.3.15).
You can now download the updated version, and it should work smoothly with the new Aseprite release.
I used it as described to try and make an ibetween for my Tween animation and it generated images that were just roatated and deformed jumping out of the canvas. Tried lowering the Squish? Still did it. Gave it more frames to see if that was issue; nope it just multiplied its broken frame
Hi kumniver, thanks for trying it out and for sharing your experience 🙏 I understand how frustrating it can feel when the result doesn’t match the examples.
Could you share a short video or GIF of what’s happening on your end? That way I can properly assess the situation and see what might be causing it.
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Testing this with a simple sliding door. On frame 1 the door is closed. On frame 12, the door is offset 45 pixels to the right. Frames 2 through 11 are empty. I select the 12 frames, and create a straight tween. The result is that it creates frames 2 through 11 in which the image moves 2 pixels per frame, which is obviously not enough. I'm not sure what I'm missing.
Hi werzaque, thanks for the detailed explanation. The setup you described is actually correct. It should read the cel in Frame 1, read the cel in Frame 12 (offset 45px), and generate proper in-between frames that smoothly interpolate the movement.
Since I’m currently away from my computer, I can’t test this exact case right now, but based on recent reports from other users, this behavior may be related to Aseprite version changes.
Tweencel was developed and tested on Aseprite v1.3.14-beta1, and some changes introduced in v1.3.15 may affect how cel positions are read by scripts. If you’re on 1.3.15 or higher, this could explain why the interpolation is incorrect.
When I get back to my machine, I’ll test your exact scenario and update Tweencel if needed.
In the meantime, could you let me know which version of Aseprite you’re using? That will help me confirm whether it’s a version-related issue.
Thanks again for reporting this, your feedback is a huge help.
Hi Werzaque, I tested your exact setup on my end using both Aseprite v1.3.15.5 and Aseprite v1.3.14-beta1 to confirm, and Tweencel is generating the correct in-between frames.
Here’s the setup I used:
The tween interpolated the movement correctly from Frame 1 to Frame 12.
I also recorded a GIF demo to show how it looks on my end. https://postimg.cc/3ycWCZG5
Since things are working correctly here, your setup might be behaving differently for a reason I can’t see yet.
Could you share a short GIF of how you’re doing it on your side? And also let me know which Aseprite version you’re using?
Seeing your exact steps will help me understand what’s causing the different result.
Thanks again for reporting this, I appreciate your help in improving the tool!
Thanks for the reply. Hmmm... can't see to view your GIF. But in any case, I got it to work when I kept the selection marquee turned on (instead of pressing Esc to deselect after copying it to frame 12) and in that case it did work.
EDIT: I'm trying again today and it works now exactly as advertised and I can't seem to reproduce my earlier problem... Will report again if I bump into it, but maybe I didn't reboot Aseprite after loading your script. Not sure if that makes sense but...
Hi, I have a problem with all the color tweens ( Hue,Saturation etc), it doesn't seem to create the inbetweens, here's an example I recorded : https://postimg.cc/RJRcYybY
Hi Chroniker99, thanks a lot for sharing the report and the video! 🙏
This might be related to how Aseprite handles color data between frames.
I’ve tested Tweencel on Aseprite v1.3.14-beta1, so knowing your version will help me check if it’s a compatibility issue. Could you let me know which version you’re using? I’ll try to reproduce it on my end and see what’s causing it.
My version is the v2.2.1, I tried with the V2.2 and V2.1 they had the same issue
Sorry, i mean what version of Aseprite you're using.
My Aesprite version is v1.3.15.4-X64
I just installed the latest Aseprite update (v1.3.15.4) and was able to reproduce the issue , it seems there’s a compatibility problem with the color tweening. Rest assured, I’ll release an update soon to fix it. 👍
Hi Chroniker99, thank you for your patience and understanding. I wanted to let you know that I’ve created and uploaded a new patch update for Tweencel (v2.2.2) to address the color tweening issue on the latest version of Aseprite (v1.3.15).
You can now download the updated version, and it should work smoothly with the new Aseprite release.
Thanks again for your support!
alpha tweening not working. it doesnt create the inbetweens and when tweaking the bar its laggish and stuck. also if you crank it up or down it deforms the layer
Hi Nohazure, thanks for the feedback! 🙏
The lag or “stuck” feeling when adjusting the alpha bar happens because the slider directly updates and applies the image alpha in real time. I recommend clicking along the slider instead of dragging it to quickly jump to your desired value.
Also, unchecking “Tween Alpha” will undo the alpha changes on the currently selected cel image.
When you select an entire layer, the alpha update is applied to all cels in that layer.
So if you only want to fade a specific cel, make sure to select that cel only before changing its alpha.
🔹 To fade out:
🔹 To fade in:
edit: added GIF link for the demo. seems like gif no longer works in the comments
Hi Nohazure, I just installed the latest Aseprite update (v1.3.15.4) today and was able to reproduce the issue, it seems there’s a compatibility problem with the color tweening. Rest assured, I’ll release an update soon to fix it. 👍
Hey! Thank you for the response.
I couldnt answer before, but thanks a lot for the notice!
I assumed it was something related with recent updates.
Thank u!
Hi Nohazure, thank you for your patience and understanding. I wanted to let you know that I’ve created and uploaded a new patch update for Tweencel (v2.2.2) to address the color tweening issue on the latest version of Aseprite (v1.3.15).
You can now download the updated version, and it should work smoothly with the new Aseprite release.
Thanks again for your support!
Does not work as intended
I used it as described to try and make an ibetween for my Tween animation and it generated images that were just roatated and deformed jumping out of the canvas. Tried lowering the Squish? Still did it. Gave it more frames to see if that was issue; nope it just multiplied its broken frame
Hi kumniver, thanks for trying it out and for sharing your experience 🙏 I understand how frustrating it can feel when the result doesn’t match the examples.
Could you share a short video or GIF of what’s happening on your end? That way I can properly assess the situation and see what might be causing it.
Hey
is there anyway you can put an HSV bar option too?.. RIght now we only have the HSL option
Hey! Thanks for the suggestion. I’ll look into adding an HSV bar option alongside HSL in a future update.
Thank you.
Great work on the tools btw…
does someone have a alt download link? itch isnt letting me download it
Hi Erans, were you able to download it? Please try again or maybe use a different browser. Thank you.