Missing some Tweak filter parameters

[Selur]

Look: http://avisynth.nl/index.php/Tweak
Could you add them?

Do those work?

bool realcalc = false
AVS+ When true, force 'no-lookup': pure float calculation of new pixel values (always true for certain Deep Color formats) (TODO - clarify)

float dither_strength = 1.0

AVS+ Control dithering amount.
For example, dither_strength=1.0 adds ±0.5 amplitude dither on the 0..255 range, and scaled in proportion for other ranges. (TODO - confirm)

source: http://avisynth.nl/index.php/Tweak
Judging by the TODOs it looked like they were not finished,...
(I can look over it during the weekend.)

Is it possible to make manual changes to the avisynth script generated by hybrid? The one that is shown in "AvisynthScriptView".

Only through the Filtering->Avisynth->Custom sections not blindly.
This won't change, since it would require tons of changes, adjustments and analysis steps to otherwise make sure preview&co still work and for Hybrid to know the basic characteristics of the clip.
-> If you need this, you should look for another tool.

Cu Selur