With the native bitmap loader at 0.01 I get sharper results than with CoronaBirmap at 0.01.
As far as I can see, there's no difference in CoronaBitmap between blur at 1 and blur at 0.01.
Can you show or share your testing setup? I get completely opposite results than you - Corona bitmap at blur 0,01 is clearly distinct from blur at 1,0, while both native bitmap and Corona bitmap are virtually indistinguishable at blur 0,01.
I did a second test with a different image and starting the scene from scratch.
The results are more or less the same.
What I get is that there's almost no difference between native loader blur @1 and @0,01, and almost no difference between CoronaBitmap blur @1 and @0,01.
HOWEVER, the images rendered with CoronaBitmap are blurrier than the native loader at the same values of blur, giving a blurrier result when lowering the value to its minimum.
I'm sending attached 3 files: 2 photoshop files and the archived 3ds max file.
Romullus, let me know if I need to post this as a question in "I need help". Thanks.