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The 46XV635D's onscreen menus are strikingly well stocked with features - though not noticeably more so than those of the RV635 series.
The first thing you see is an unusually helpful set of picture presets, including AutoView, Toshiba's quite sophisticated mode that combines analysis of both the ambient light conditions in your room and the image content in order to arrive at what it judges to be the optimal picture settings.
There's also: a surprisingly flexible colour management mode complete with the facility to turn off individually the red, green or blue colour elements; the option to deactivate the dynamic backlight; a handy black/white level sliding bar; a good degree of static gamma adjustment; both MPEG and standard noise reduction routines; the option to turn 100Hz on or off; and the facility to not only switch Resolution+ on or off, but also adjust the 'heaviness' with which it works.
For me, this latter tool is one of the most important options in the whole onscreen menus. For if you set it too low standard def pictures start to look a bit soft, or if you set it too high the picture starts to become gritty.
Personally I found nudging the Resolution+ level down to two from its default three setting gave the most pleasant overall results with Freeview and Sky standard definition broadcasts. But the main point here is that Toshiba has thoughtfully provided enough flexibility to allow you to adapt the feature to suit your own tastes.
Once tweaked to my satisfaction, Resolution+ leaves me impressed once again with its knack for adding detail and sharpness to standard def pictures without simultaneously exaggerating source noise. In fact, its impact is arguably even more impressive on this 46in screen than it has been on the smaller Resolution+ Toshiba TVs I've tested previously.
The sheer size of the 46in screen might also have something to do with the way I felt that the 46XV635D's pictures looked brighter and more vibrant than those of its smaller siblings. Sure, some picture presets - especially Movie - still leave things looking a touch too dull for comfort. But using my own settings, I felt I was able to get a decent enough balance of brightness and black level response.
In fact, the 46XV635D's reproduction of black really is good, as the darkest corners of the darkest scenes manage to suffer relatively little with LCD's still-common grey mist problem, while also managing to contain at least a degree of shadow detail. Surprisingly, the 46XV635D even achieves good black levels without the Active Backlight Control being switched on, so you also don't have to worry about dark scenes being marred by that common LCD problem of distractingly obvious shifts in backlight output.