I tried to burn 25 Gb  BR-R (just as data disk, no fancy video) but discovered that k3b as shipped with TDE: R14.1.3 does not allow me to pick BD-sized project.

Is there chance to see  "on the fly" (due to hdd space constrains on my end) BD /udf 2.01 mastering added to k3b?

For now I used imgburn under wine, but cdrecord seems to know how to deal with BD drivers and disks:

 guest@slax:~$ cdrecord -atip -dev 4,1,0
Cdrecord-ProDVD-ProBD-Clone 3.02a09 (i686-pc-linux-gnu) Copyright (C) 1995-2016 Joerg Schilling
scsidev: '4,1,0'
scsibus: 4 target: 1 lun: 0
Linux sg driver version: 3.5.36
Using libscg version 'schily-0.9'.
Device type    : Removable CD-ROM
Version        : 5
Response Format: 2
Capabilities   :
Vendor_info    : 'ASUS    '
Identifikation : 'BW-16D1HT       '
Revision       : '3.11'
Device seems to be: Generic mmc2 DVD-R/DVD-RW/DVD-RAM.
Using generic SCSI-3/mmc-3 BD-ROM driver (mmc_bdrom).
Driver flags   : NO-CD BD MMC-3 BURNFREE
Supported modes: PACKET SAO LAYER_JUMP
cdrecord: Warning: Cannot read drive buffer.
cdrecord: Warning: The DMA speed test has been skipped.
Disk type:          'BDR' (BD-R)
Disk class:         01
Manufacturer:       'RITEK'
Media type:         'BR3'
Disk:               is not in cartridge
Media cartrige:     write protect is off
Free Spare Blocks:  0
Alloc Spare Blocks: 0
rzone size:         40
rzone number:       1
border number:      1
ljrs:               0
track mode:         4 copy: 0
damage:             0
reserved track:     1 blank: 0 incremental: 1 fp: 0
data mode:          1
lra valid:          1
nwa valid:          0
rzone start:        0
next wr addr:       0
free blocks:        0
blocking factor:    32
rzone size:         10877120
last recorded addr: 10877119
read compat lba:    0

    Capacity  Blklen/Sparesz.  Format-type  Type
    10877120                0         0x00  Formatted Media
guest@slax:~$