OK. Try this version of the 3D Particles in 2.0\. (I cannot guarantee it will work in 1.x)

Follow the instructions here to install it: http://troikatronix.com/support/kb/installing-an-isadora-plugin-manually/

To get the old behavior, turn the new 'tex scale auto' input _off_.

Let me know how it works out.

Well, actually there was a flaw in the original version that I fixed. But that fix broke your patch.

Take a look at the first image below, which was made with the 3D particles in Isadora 1.x. If the number of vertices was four, you had a square or rectangle (if you scaled it) and everything was good. But, if you had more than four, you got the image on the right, where you see artifacts streaming out from the edges of the image. That's because 3D Particles was trying to "draw outside the lines" -- and the result is that the edge pixels of the image are repeated.

In the more recent, 2.0 version, I fixed this problem by scaling the particle size down, so that regardless of the number of vertices, it was always inside the texture. The next image shows the same exact patch in Isadora 2.0\. As you can see, it's what you want if you're using more vertices, but obviously you can't get to the edge of the image.

I will add two parameters to this actor to allow you to scale the images within the frame so you can have it either way. I won't be able to do this immediately, so you may want to grab the 3D Particles plugin from 1.3 and put it into 2.0\. It should work fine. This article will help you: http://troikatronix.com/support/kb/installing-an-isadora-plugin-manually/

(Make a back up of the 2.0 plugin just in case it doesn't work.)