@eamon said:

You can use the Brave browser if you do not have youtube premium. It removes all the ads.

 Off topic: I've never heard of Brave Browser before - it looks amazing. Thanks, for the tip!

Cheers,

Hugh

Bumping this thread - does anybody have some new ideas for a Slit Scan shader? or should we put in a feature request for a more flexible Slit Scan actor? (inputs for width of slit and speed would be nice, horizontal and vertical offset might be interesting)

@ray said:

Don't know what I did

 I would take note of which USB ports you are using, this likely is playing a role. (some USB C ports offer more features than others)

I somehow got Isadora to not crash with all projectors connected. I started switching the cables around and restarting then testing Izzy. Don't know what I did (right or wrong). But I'll take it as a win.  If for some reason it acts up again you know I'll be back.

Thanks for all your help. It's really nice to have help when you don't have a clue...

Ray

@eight said:

publishing an X offset of the input in the projector actor

 I believe this is working in this configuration, unless I miss understand. 

My input is 3000px by 1080px In IzzyMap, 

I move my rect to the far left and select each right side corner, and enter 1920 (this creates my 1920x1080 output selection) 

I right click the Rect slice, and publish the Offset X 

Then on the Projector, I can move my view from the left edge to the right edge. (-1 thru 1)

@eight said:

Am I missing something

 You could also use a Composite rectangle IzzyMap Slice and publish the x offset of each corner of the input separately, but then you have to do math to keep the image centered.

@eight

Try this: patch-matte-panning-2026-04-16-4.1.3.zip

@emullis

Hi

I would strongly recommend watching Mark's (that Mark's) guru session on youtube.

The guru session is excellent at explaining the methodology and steps you need to take here. 

There is about 1hr 30mins of content and well worth the watch.

Link to Guru 12, HERE

This video is exactly what you are doing. You can use the Brave browser if you do not have youtube premium . It removes all the ads.

eamon

@emullis

There's some info on page 477 of the Isadora 4 manual, which if you don't have it is downloadable from here:
https://troikatronix.com/files...

Might shed a little light on what those parameters do.

HTH

Mark (not that Mark)

I have a super wide movie frame, which I'd like to pan horizontally, to show just a portion of the frame at each point in time. I hoped to be able to do this by publishing an X offset of the input in the projector actor and then animating it using Envelope actor, however, it seems that this offset controls the projector's output, regardless of from where I am publishing it –– input or output control of the IzzyMap. Am I missing something, or this is a feature request?

Thanks.