I've used a blue background to "indicate" the transparent layers Step 1 - Draw some lines (as shown) on the fisrt PSP layer. Step 2 - On a second layer draw a white torus. step3 - IN the PSP layer menu go to the layer style menu then choose "inner glow" In the inner glow effect menu set the default color to black, set the glow mode to "normal" set the glow size to get the wanted gradient. Step 4 - Make a selection of the torus, invert the selection, go to the layer one and erase the selection. The lines on the first layer must fit the torus perfectly ( as shown on the pic 4) Step 5 - add a new layer to the composition, select the torus, return to the new layer and make 2 "contour" using black and white colors. Once that done, merge the layers and add a soft blur. Step 6 - make a selection and cut the part you want of the torus. step 7 - Duplicate the cut part, give it a 90 rotation, duplicate it again, rotae it etc etc etc as many times as needed.. step 8 - Merge the differents parts in one layer , duplicate it, resize it (as many time as needed) give each layer diferents contrast value. I'm sorry but I don't have the time to make a more complete tutorial, I hope that my indications will help those that want to try to make some (tubes). Cheers! (sorry for my poor language.... Why don't you all speak French!!!! LOL)