This goes with the color, brightness, pixilate, swirl, mosaic and such block.

And I'd like to see saturation control for the pen, too.
(See this project for custom blocks that provide hue, saturation and lightness control for the pen for now, until the Scratch devs give us built-in saturation control… pretty please )

However, I think one of the reasons it's not there now (both pen & sprite effects) is because many Scratchers would not understand what it means.
I'd be tempted to use a word like “greyness” instead, and have it be the reverse of saturation (so zero is the current default, and 100 would be totally grey, at which point the colour plays no part).

So:

set pen color to ()
set pen shade to () // why isn't this "brightness', like below?
set pen greyness to () //category=pen

set [color v] effect to ()
set [brightness v] effect to ()
set [greyness v] effect to ()

Note that the brightness effect is slightly different to the pen's “shade” block, in that it can both brighten (positive values) and darken (negative values) a costume. I wonder if that's why the name is different…?

I've had the idea of this new effect for a while, and I feel like it's something the Scratch Team could easily implement. Basically, it makes a sprite or the stage black-and-white, or, more gradually, takes colour out of it. It's not much, but I think it would be a useful addition.

For that we have the

set [brightness v] effect to ()

. I think that's what you mean.

I don't mean turning the sprite/stage just black or just white like the brightness effect does, I mean making it greyscale, which means you can still see all the details, but without colour, only in black and white.

I may be wrong, but I think the brightness does that. Just don't set it to 100 or -100, set it to 90 or -90. Anyway, if I'm wrong, then I semi-support as it might not be used in many projects but still useful.

I've just tried setting the brightness effect to 90 and -90 and it just produced a brighter/darker image, but still coloured. I'm trying to use this for a vector sprite, and the effect I am suggesting is to make the image greyscale. I'm sorry if I'm not being clear enough and this is going backwards and forwards.

SUPPORT!
THIS PERSON WANTS A GREY-SCALE EFFECT!

Support.

He's asking basically to add this

set [saturation v] effect to (0)

I support, it would be a useful thing to use for many people.

ChildCritic wrote:

SUPPORT!
THIS PERSON WANTS A GREY-SCALE EFFECT!

wat

-Io- wrote:

ChildCritic wrote:

SUPPORT!
THIS PERSON WANTS A GREY-SCALE EFFECT!

wat

I do not see how you could be confused.

I like saturation… Support

How would this work?

set [greyscale v] effect to (50)

would look ugly, and greyscale light is solved by

set [brightness v] effect to (0)

change [greyscale v] effect by (25) // You mean this?
change [saturation v] effect by (25) // This is basically the same as B&W and greyscale.

Anyway, I support.

I suppose I'll support…

Sounds interesting…as per some posts above, this would be useful for some projects.
Support!

Support! This would've helped me in my past projects.

ChildCritic wrote:

SUPPORT!
THIS PERSON WANTS A GREY-SCALE EFFECT!

I think he's asking for Saturation; grey-scale is for art isn't it?

no support

fredfish10 wrote:

no support

Why?

Support.