Got my new HD6950 now, still waiting on the RMA for my old one, but it's been approved. Also got the LG firmware they sent out, and updated my 42LW450U TV.
The good news: The firmware didn't break anything.
The bad news: It didn't fix anything either. Actually I couldn't tell you what it did, except to say that it did successfully update.
@Skyguy3d & Butmuncher - I have now, with the new card, tried using the DSUB cable (via DVI->DSub dongle on the PC side). This does indeed fix that doubling issue that's (still) present with HDMI1.4. To be honest, the DSUB works far better than I expected it to - I remember hooking up a TV like that in the past and the picture was appalling, which is why I was so reluctant to try it this time (as opposed to actual DVI). Tbh, it's hard to tell the difference unless you're close up to the set, in which case it's a little more blurred.
With the DSUB fixing the MASSIVE interleave ghosting, I'm now left with minor watermark ghosting but it's only "really" noticeable when a 3d object is either on a very high contrast background. Once again however, this problem is absent if running in HD3D mode over HDMI 1.4.
For the reasons of a: being able to use HD3D and b: because DSUB works well enough, I haven't tried using the EDID override again at this stage.
@SkyGuy3d: HD3D over DDD Tridef is FAR easier to use than iZ3d's implementation. The only caveat is that if you want to play a game at 1080p24, it'll pretty much natively, but if you want to run it at 720p50, you MUST set both the in-game res AND your windows desktop to both 1280x720 FIRST, before switching to 3d.
iZ3d DOES work with both 1080p24 and 720p50 but you have to go a step further than Tridef, which is that you not only have to do the above tridef steps but you also MUST set both your res AND your refresh rates on your desktop to 1080p24 or 720p50, respectively, BEFORE you try and run anything. (Which, consequently, lags out windows and is just plain painful)
Between the two, I've found the quality of Tridef to be superior, at least with considerably less fiddling, especially where HD3d is concerned, wheras iZ3d has far more "it just works with unknown software" compatibility in interleaved mode.
Two prime examples are with Dragon Age origins and Bulletstorm:
HD3d with iZ3d - Character creation screen, let's just say it looks like you're designing twins. The character image is literally doubled a few inches apart.
HD3d with TriDef - Just works
(Interleaved with either seems to work iirc.)
Tridef hates this game in general unless you turn off AA - we're talking a difference of 2 to 60+ fps difference here between AA on and off both in HD3d AND interleaved mode. The rest of the settings are fine though. Tridef has FAR superior gun focus and is much easier to play over iZ3d though as you don't go crosseyed with ironsights etc.
iZ3d just works, doesn't much care about AA etc, but ghosting and separation issues are far more apparent, especially with the gun and ironsights which I've personally found to be nigh on impossible. This is interleaved, have not tested with HD3d.
Actually this is quite a common trend for a number of games (such as Dead Space 2), where iZ3d DOES work, near field objects are highly seperated and ironsights or general aiming is nigh on impossible. Shadows, "generally" aren't handled as well with iZ3d either, whereas Tridef seems to get both near field objects and shadows right "more" of the time. (And yes, that's "more", not "most".
iZ3d works better for generic Source engine games, but if a profile exists, Tridef seems to have better quality. ie: I can't get Nation Red to run with Tridef even though it supports HL2, L4d etc, but it does with iZ3d without fuss. However, L4d etc is more comfortable to play with Tridef.
One thing I'm beginning to question through my various observations, and whether or not it's related to the LG hardware, is this:
Going back to my ghosting issues with Tridef Experience in Passive under HDMI - I noticed while briefly testing Borderlands in HD3D (different, I know), that there was one scene where the image split when it became extreme near field. This is the scene right at the beginning of the game, just after you've chosen your character, still on the bus when the camera zooms into the bobblehead. The bobblehead split apart.
This got me thinking and I started looking for it elsewhere, and as far as I can tell, I don't actually see "popout" images. Anywhere. As good as the 3d is, I only really ever see it from a "looking through a window" perspective.
I need to investigate this further, but I'm beginning to wonder if it's to do with the hardware, because no matter the settings (convergence / separation) I change (recalling back to various tests), images will flatten, or get increased depth, but I've "never" seen anything actually "feel" like it's closer than the screen itself.
Which in itself "may" go as far as to explain the Tridef Experience issue under interleaved; if it's trying to pop out of the screen but something in the image processing, somewhere (or panel tech, or video card bios) is overriding this and thus causing it essentially to pancake at the near field, wheras with HD3D and DSUB for whatever reason it's shifting the whole scene's depth (nearer convergence plane) deeper into the scene.
I realise some of that may sound contradictory and not make a lot of sense, but I'm clutching here. Maybe someone with far more knowledge of 3d would be able to explain that a bit further?
I still don't understand why interleave should work with DSUB but not HDMI though, suffice to say I've got different options available to me depending on what I actually want to do with 3d.
Finally: I've found HD3D to be... acceptable... in some circumstances. Pretty much as long as it's not a shooter, it's perfectly fine. The caveats I've read elsewhere help - Disable vSync (even though my card can handle it, it causes less pixel smearing, and tearing isn't really noticeable for whatever reason through the polarised glasses), Disable AA (again, tends to cause, pixel smearing with panning motion). In 1080p24 it's pretty crap, but 720p50 is surprisingly alright; now whether or not it's because I'm sitting 3m back, or to do with the way that it's interpolating, but 720p 3d and 1080p normal are to me at least almost indistinguishable in terms of quality. That said, 720p NON-3d is clearly less refined, so Skyguy, you might if you haven't already want to try giving 720p50 a shot at some point? (None of this is to say that interleaving isn't the superior option - I'm the first one to claim being an FPS junkie and anything less than 60 does tend to annoy me regardless of the argument of what your eye can percieve - but it's definitely noticable when you're flicking the view around- but I've personally found that HD3d seems to offer superior 3d quality over interleaved (and image space); at least in my case)