In another thread, the oft-debated topic of the Miranda-class starship variant came up again. Basically, it breaks down to some VFX shots of the background ship showing the aft section of the rollbar pod, which had been built as aft-facing torpedo launchers in the physical model for "The Wrath of Khan", being apparently lit as additional impulse engines. This was a nice easter egg to us tech nerds, as it visibly demonstrated that Starfleet had the mindset to upgrade century-old designs with more propulsion, probably to better fight the Dominion.
However, there was some debate as to whether the glowey red (and glowey nacelles) on these models was a VFX goof or deliberate. There is some evidence that the pod itself had been modified in the CG model (the physical model was not used for DS9 after the series premiere) to include engines, but some people (like me) see the possible differences as being obscured by the red glow, and that the glow was simply applied to the model by a CG artist who didn't know the aft torpedo tubes were not engines.
http://images4.wikia.nocookie.net/_...es/b/b2/Miranda_class_upgrade,_dorsal_aft.jpg
Following the topic coming up again, I went looking up screencaps to support the VFX goof theory. First off, I discovered that the CG Miranda with the lit-up pod is in other episodes BEFORE the series finale "What You Leave Behind". I'd previously thought it was a lighting error confined to that episode. However, here's a cap from "Tears of the Prophets", the S6 finale, and there's three, count 'em THREE, Mirandas with the warp nacelles and aft pod lit up:
http://ds9.trekcore.com/gallery/albums/6x26/tearsofthephrophets_474.jpg
However, later in the same episode, here's shot with a couple Mirandas that had no "extra engines" or nacelles lit:
http://ds9.trekcore.com/gallery/albums/6x26/tearsofthephrophets_539.jpg
And while I'm at it, here's one of the poor USS Shir'Kahr, with ONLY the nacelles lit:
http://ds9.trekcore.com/gallery/albums/6x26/tearsofthephrophets_655.jpg
Now I wouldn't NECESSARILY use this as evidence that there are multiple variants, and that it's just a VFX goof. The DS9 Compendium confirms that in the bigger battle episodes like this one, multiple FX houses are engaged to provide the shots. They would all be given the same models, but be given leeway in how those models are lit. I would have concluded that these shots were from different FX houses and one lit the model one way with glowey nacelles and pod, and the other not.
But THEN, when reviewing more screencaps from the same episode, I found this one from the first shot... Showing one of each kind of Miranda practically SIDE BY SIDE!
http://ds9.trekcore.com/gallery/albums/6x26/tearsofthephrophets_479.jpg
So admittedly, I'm buffaloed here! It's much tougher to class it a VFX goof if the actual CG model was programmed to be lit one way AND another in the same shot. This strongly suggests that at the very least, the same CG model was programmed as two variants which were used in the fleet scenes as two separate models.
While I'm not completely convinced that the models are physically different - the "lit" variant differences IMO could still be masked by the red glow of the engines on these fuzzy screencaps, and I would need a clear shot of the "lit" version to believe it's different - it's fairly clear that some animator from one of the FX houses did mean for these ships to be different. Usually when you program a fleet scene, you simply import the same rules for the model and copy-paste apply them to each instance of that model in the shot. That obviously wasn't the case here.
Given that this particular episode is replete with fun references - it is the SINGLE BEST EPISODE of the franchise to make such an effort to name and label separate ships, including Shir'Khar, Galaxy, Hood, Valley Forge, Nautilus, etc. - it may be that the Miranda variant first showed up here as an Easter Egg that followed through the subsequent season. Wow, you learn new things from fifteen year-old episodes all the time!
Mark
However, there was some debate as to whether the glowey red (and glowey nacelles) on these models was a VFX goof or deliberate. There is some evidence that the pod itself had been modified in the CG model (the physical model was not used for DS9 after the series premiere) to include engines, but some people (like me) see the possible differences as being obscured by the red glow, and that the glow was simply applied to the model by a CG artist who didn't know the aft torpedo tubes were not engines.
http://images4.wikia.nocookie.net/_...es/b/b2/Miranda_class_upgrade,_dorsal_aft.jpg
Following the topic coming up again, I went looking up screencaps to support the VFX goof theory. First off, I discovered that the CG Miranda with the lit-up pod is in other episodes BEFORE the series finale "What You Leave Behind". I'd previously thought it was a lighting error confined to that episode. However, here's a cap from "Tears of the Prophets", the S6 finale, and there's three, count 'em THREE, Mirandas with the warp nacelles and aft pod lit up:
http://ds9.trekcore.com/gallery/albums/6x26/tearsofthephrophets_474.jpg
However, later in the same episode, here's shot with a couple Mirandas that had no "extra engines" or nacelles lit:
http://ds9.trekcore.com/gallery/albums/6x26/tearsofthephrophets_539.jpg
And while I'm at it, here's one of the poor USS Shir'Kahr, with ONLY the nacelles lit:
http://ds9.trekcore.com/gallery/albums/6x26/tearsofthephrophets_655.jpg
Now I wouldn't NECESSARILY use this as evidence that there are multiple variants, and that it's just a VFX goof. The DS9 Compendium confirms that in the bigger battle episodes like this one, multiple FX houses are engaged to provide the shots. They would all be given the same models, but be given leeway in how those models are lit. I would have concluded that these shots were from different FX houses and one lit the model one way with glowey nacelles and pod, and the other not.
But THEN, when reviewing more screencaps from the same episode, I found this one from the first shot... Showing one of each kind of Miranda practically SIDE BY SIDE!
http://ds9.trekcore.com/gallery/albums/6x26/tearsofthephrophets_479.jpg
So admittedly, I'm buffaloed here! It's much tougher to class it a VFX goof if the actual CG model was programmed to be lit one way AND another in the same shot. This strongly suggests that at the very least, the same CG model was programmed as two variants which were used in the fleet scenes as two separate models.
While I'm not completely convinced that the models are physically different - the "lit" variant differences IMO could still be masked by the red glow of the engines on these fuzzy screencaps, and I would need a clear shot of the "lit" version to believe it's different - it's fairly clear that some animator from one of the FX houses did mean for these ships to be different. Usually when you program a fleet scene, you simply import the same rules for the model and copy-paste apply them to each instance of that model in the shot. That obviously wasn't the case here.
Given that this particular episode is replete with fun references - it is the SINGLE BEST EPISODE of the franchise to make such an effort to name and label separate ships, including Shir'Khar, Galaxy, Hood, Valley Forge, Nautilus, etc. - it may be that the Miranda variant first showed up here as an Easter Egg that followed through the subsequent season. Wow, you learn new things from fifteen year-old episodes all the time!

Mark
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