[romandesign]

You are posting in a guide.  It starts on page 1.  After reviewing, if you're still really lost with how to set things up, Private Message me and I'll teamviewer into you to help.  The PM button is located near the top right on the page after you click on my name to the left on this page.

This guide is describing Nvidia 3d enabled + kodi, which I'm using but getting the results I'm getting... You were saying you don't have 3d enabled in hardware and mentioned another software, so I was looking for a guide to that, and what software you are are using. I found an old thread mentioning half-size TAB and there was someone's reply "Yes, you are right it's not possible to display Full SBS/TAB at full resolution without frame packing due to hardware limitation. XBMC will scale Full SBS/TAB to HALF SBS/TAB." - if that's still true that confirms my fears. That would also mean it's impossible to get FHD3D in Kodi. So I'm left with the question what software DOES allow FHD3D through Nvidia 3D hardware, with or without hardware 3D enabled? Looks like half-resolution doesn't matter for 3DTV people because most 3DTVs halve it anyway. But my projector can do true full FHD3D.
Update: Kodi WIKI actually says "When connecting a HDMI 1.4 frame packing 3D capable HDMI display to an NVidia GPU, "Enable stereoscopic 3D" must be enabled in Windows NVidia Control Panel to use it. In Kodis "stereoscopic 3D mode" selection, this enables "Hardware based" for that display. It also enables the "HD 3D" modes 1080p24 and 720p50/60 in the NVidia Control Panels "Change resolution" section." So with Kodi enabling hardware 3D is the only way, but it does support FHD3D on Windows/Nvidia (my setup). I also found a mention that setting MKV header "video display" width and height to normal HD, i.e. half of vertical resolution of "video pixel" height and width, should help. I will try that...