Hi Mark. Thanks for your reply.
I can't see the problem here in *generate* a file name (as UUID) to prevent 
the case that TW5 must know the file name which is unavailable at this 
particular moment. After save it to a (TW5) folder it should be possible to 
generate a uri from that place for thumbnails. It is another topic to 
import and provide a thumbnail from an external uri fmpov. 

On Tuesday, December 29, 2020 at 11:04:21 PM UTC+1 Mark S. wrote:

> I think the approach would have to be from the other direction. You would 
> have a script or program that would look at a directory of images, create 
> tiddlers, and maybe create thumbnails. Then you could import the generated 
> tiddlers into your TW.
>
> We've been told (I think) that the name of the file is unavailable when 
> you drop into a web page (including TW). And of course modern browsers 
> won't let your web page save to specific directories (just the nominated 
> download directory).
>
> I do have a script that runs in TW where you provide a list of file names 
> and then it creates the tiddlers with the _canonical_ uri filled in.
>
> Actually creating thumbnails would have to be done through an external 
> file manipulator, I suspect.
>
> On Tuesday, December 29, 2020 at 1:05:37 PM UTC-8 Mat wrote:
>
>> +1
>> I'm in a very similar situation! I posted this request 
>> <https://github.com/Jermolene/TiddlyWiki5/issues/5309> a few days ago 
>> which is related but complimentary. 
>> These functionalities would make TW substantially more useful for e.g 
>> authoring books or other image intensive documents.
>>
>> <:-)
>>
>> On Tuesday, December 29, 2020 at 9:46:26 PM UTC+1 HP wrote:
>>
>>>
>>> Hello all,
>>>
>>> I'm looking for a plugin or an already existing TW5 function for my 
>>> excessive image based working process. Based on the sheer number of to be 
>>> processed images, it is neither possible to save them manually nor in TW5 
>>> (I don't like nodejs a lot - so "lazy load" isn't an option).
>>>
>>> I want TW5/a plugin to "build externalimages" (aka just save images 
>>> separately through TW5) ad hoc with the import process (drag'n drop or copy 
>>> paste) by saving the image into a/tbd/asked separate file folder AND create 
>>> a thumbnail/image tiddler with or by its _canonical_uri to it.
>>>
>>> Maybe this process could handle all files TW5 is able to create 
>>> thumbnails of (eg PDF).
>>>
>>> Thank you for your hints in this direction and please apologize my bad 
>>> English.
>>>
>>> Best regards,
>>> HP
>>>
>>> tl;dr 
>>>
>>>    1.  import image by dnd or as a screenshot from clipboard  (instead 
>>>    of saving one of those myself to s TW5 image folder)
>>>    2. let TW5 save it to its/a file subfolder
>>>    
>>>    Bonus
>>>    3. create a tiddler from the image import with a thumbnail through 
>>>    its uri to the file subfolder it was saved to
>>>    
>>>

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