LDI

LDI has per viewing direction ("pixel") an extra byte holding amount of depth pixels in that direction.
Average LDI depth is 1.26  (literature) -> (1.26 + 1)TexSize[REF]
These pixels are RGBAD instead of RGBA
Currently I don't know about image compression possibilities. Assuming some JPEG-like ratio  is reachable.

[Graphics:../Images/bytesize_gr_65.gif]
[Graphics:../Images/bytesize_gr_66.gif]
[Graphics:../Images/bytesize_gr_67.gif]
[Graphics:../Images/bytesize_gr_68.gif]
[Graphics:../Images/bytesize_gr_69.gif]
[Graphics:../Images/bytesize_gr_70.gif]
[Graphics:../Images/bytesize_gr_71.gif]


Converted by Mathematica      February 7, 2002