I prepared a composite, starting with a .PNG with alpha of a spaceship on the top track. If I put an .AVI with alpha of flames on the track below, I can see it through the alpha of the .PNG and see the flames, just as expected.
However, I wanted to put the flames on the track above so that I could position them directly onto the spacecraft's thrusters, and SURPISE! Placing the .AVI on the track above the .PNG resulted in the .AVI becoming invisible - no flames, no nothing - just the track BELOW (spacecraft .PNG) is visible. If I mute that track, then the flames from the .AVI on the track ABOVE become visible.
How is this possible? I thought that the top track always took precedence - how could muting or unmuting the track BELOW affect the track above?
Similarly, if I put a solid color on a new third track (placed as the lowest track), it blanks the .AVI on the track above (the middle track); but the alpha on the top-track .PNG still works, so I can see the solid color through the spacecraft .PNG's alpha channel (the spacecraft also is appropriately visible). But why can't I see the .AVI sandwiched between the two other two tracks?
I created the .AVI flames from Particle Illusion and rendered to Logarith RGBa (alpha), like always. I did it twice, making sure that I did it the way I'd always done it. Bringing the Logarith RGBa into Vegas, I went to Properties>media>alpha and chose Premultiplied. I'm almost certain that's how I'd always done it, but I have never before seen this strange behavior where changing the track below affected tracks above.
It should be noted that the .AVI thumbnail in the Project Media bin just shows a blank checkerboard as if the entire frame is an alpha channel - no flames are shown in the .AVI thumbnail.
I'm using Vegas 8c on Win7-64bit; this is my first Logarith AVI in the 64-bit system. Suggestions?
However, I wanted to put the flames on the track above so that I could position them directly onto the spacecraft's thrusters, and SURPISE! Placing the .AVI on the track above the .PNG resulted in the .AVI becoming invisible - no flames, no nothing - just the track BELOW (spacecraft .PNG) is visible. If I mute that track, then the flames from the .AVI on the track ABOVE become visible.
How is this possible? I thought that the top track always took precedence - how could muting or unmuting the track BELOW affect the track above?
Similarly, if I put a solid color on a new third track (placed as the lowest track), it blanks the .AVI on the track above (the middle track); but the alpha on the top-track .PNG still works, so I can see the solid color through the spacecraft .PNG's alpha channel (the spacecraft also is appropriately visible). But why can't I see the .AVI sandwiched between the two other two tracks?
I created the .AVI flames from Particle Illusion and rendered to Logarith RGBa (alpha), like always. I did it twice, making sure that I did it the way I'd always done it. Bringing the Logarith RGBa into Vegas, I went to Properties>media>alpha and chose Premultiplied. I'm almost certain that's how I'd always done it, but I have never before seen this strange behavior where changing the track below affected tracks above.
It should be noted that the .AVI thumbnail in the Project Media bin just shows a blank checkerboard as if the entire frame is an alpha channel - no flames are shown in the .AVI thumbnail.
I'm using Vegas 8c on Win7-64bit; this is my first Logarith AVI in the 64-bit system. Suggestions?