You might try applying the texture to a lattice or a terrain, that way you can control how big it is.

It's not the size that's the problem, it's the fact that the plane is not turning completely transparent. If you look against the sky, you can see the corner edges. I want it to be completely transparent, except for the 'smoke'.

The only problem I can address is that your image is bleeding off the top. That right there is the major giveaway to it being a 2d image to me.

Try hitting the "copy" button on your first square in the picture dialog window (above), then use "paste" button on the second square to insert it into the alpha channel. The smoke picture should now be in both pictur boxes. Good luck!

Attached Link: http://www.subspacegraphics.com/transmaps.html

make sure to enable blend transparency in the arrow to the direct left of the first component window in the material editor. Make sure the alpha is loaded into the second window.

Oh, and follow MuddyGrub's advice as well.

I think she means in the black places she can see the edges too (I can). Make sure that the black in your pic is indeed black and not a very dark grey. If it is not 100% black you will see the edges. Increase the contrast of the photo in a 2D package to make sure to darken the dark places some more.

What MuddyGrub said is the problem. Try that and the problem will be solved.

Errr, yes, you have to move the lighter part away from the edge, too.

tjohn has a point, the image runs off the square, try fixing that. If that doesn't work, and you are still convinced that the image just isn't going completely transparent, thenwhat you can do is go into a picture editor. let's say... even the basic windows paint program will do. paste the image, and then with the eyedropper tool thingy... put the cursor over a section without the white in it. a supposedly completely black prtion of the picture. copy the color of the pixel you have chosen. then open a new paint document, create a square, then paste the color onto it. then save it. when you go back into bryce, create a really big square, and cover your entire scene with it. in the materials editor, give it the copied color texture that you have created, and apply the same alpha stuff, transparency stuff... whatever, to it as you did for the picture. then when it is ready and seems to be just as transparent as the original picture, put the original picture square in the foreground of your scene, so that it is in front of your enormously big square. that way, where the transparent line of the original picture fails to disappear, the big square willcover up for it. *phew that was a long tutorial.... or you can take the original picture, put it into the paint program, and make a bigger square around it. that is the same color as the black parts of the original picture, and then apply that texture to one big square *i know, i know, i should've said that last tutorial in the first place, but i was way too lazy to erase the first one

Whew, thanks all for these wonderful tips. I tried a number of things (all but this great tutorial, which I will save!) and please, don't laugh, but I found the problem. I was applying my image to the regular 2d plane, and not the leonardo guy primitive! As soon as I switched to him, the transparency worked perfectly! I didn't even realize that he was an object! Thanks for all your thoughtfulness. Tres