With that test image the result from the general Voukoder 8-bit 4:2:0 template looked okay. Saturations are a bit different between the Voukoder renders than the original but perhaps that's because they are clamped to Rec 709 upon output?
With MPC black and the 10-bit 4:4:4 the superwhites and blacks are lost. The 10-bit file also doesn't look right bringing it back into Vegas.
I then went into the custom preset and just took the 8-bit 420 template and changed it to 10-bit 444 while keeping everything else the same. This version looks fine in MPC and Vegas, and the same as the 8-bit 420 one. So something is wrong with the Voukoder template? I did both UHD and 1080p and they look the same for both render templates.
Second version settings:
General
Complete name : C:\Users\Roger\Desktop\UHD 10bit 444 third time.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 360 KiB
Duration : 5 s 5 ms
Overall bit rate : 590 kb/s
Writing application : Voukoder (VEGAS)
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High 4:4:4 Predictive@L5.1
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference fra : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 5 s 5 ms
Bit rate : 587 kb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Chroma subsampling : 4:4:4
Bit depth : 10 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.003
Stream size : 359 KiB (100%)
Writing library : x264 core 164
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=10 / psy=1 / psy_rd=0.77:0.00 / mixed_ref=1 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=2 / threads=12 / lookahead_threads=3 / sliced_threads=0 / nr=8 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=11 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=480 / keyint_min=3 / scenecut=40 / intra_refresh=0 / rc_lookahead=110 / rc=crf / mbtree=1 / crf=17.0 / qcomp=0.60 / qpmin=0 / qpmax=24 / qpstep=4 / ip_ratio=1.40 / aq=3:0.80
Codec configuration box : avcC
Not working settings:
General
Complete name : C:\Users\Roger\Desktop\Voukoder 10 bit 444.mov
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt 0000.02 (qt )
File size : 518 KiB
Duration : 5 s 5 ms
Overall bit rate : 849 kb/s
Writing application : Lavf59.16.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High 4:4:4 Predictive@L5.1
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference fra : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 5 s 5 ms
Bit rate : 846 kb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Chroma subsampling : 4:4:4
Bit depth : 10 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.004
Stream size : 517 KiB (100%)
Writing library : x264 core 164
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=10 / psy=1 / psy_rd=0.77:0.00 / mixed_ref=1 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=2 / threads=12 / lookahead_threads=3 / sliced_threads=0 / nr=8 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=11 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=480 / keyint_min=3 / scenecut=40 / intra_refresh=0 / rc_lookahead=110 / rc=crf / mbtree=1 / crf=17.0 / qcomp=0.60 / qpmin=0 / qpmax=24 / qpstep=4 / ip_ratio=1.40 / aq=3:0.90
Codec configuration box : avcC