Naruto Ultimate Ninja Impact - Hachibi shading wrong

[unknownbrackets]

See related issue #4155.

GE dump: ULUS10582_#4155_naruto_white_enemy.zip

The first pass dark shading uses slope mip mapping + shade mapping from 0x08940480.

Correct result (same frame using dump):

With #11567, we're getting most of this right, but it's too harsh. Even the white may be too harsh (not sure):

Forcing the bias from slope + 0.0625 to const 1.0 gives us the smoother shading expected:

-[Unknown]

[unknownbrackets]

Updated the correct result to be exactly the same frame. The white is off somewhat. It almost looks closer if I use (0, 0, 0.85) or something, but not quite.

-[Unknown]

[ghost]

Correct result (same frame using dump):

PPSSPP v1.9.3-1015