The Standard Bitmap node hasn't beed updated since ages or the very beginning.
We need Bicubic Interpolation in Standard Bitmap node - like in OSL UberBitmap or Corona Render or anything else.
Unfortunately I can't use OSL UberBitmap because textures with alpha gets the dirty outline.
I also can't use Corona Bitmap because its slow and cant wire the offset parameter to manipulator.
Also, we need additinoal node that can extract alpha channel as grey from the btmap. The Ouput node doesnt have that feature,
you can add it.
