how to create non aliased rect marquee selection?

[chippwalters]

Not sure what I'm doing wrong, but when I select a single row of pixels on a pixel layer, it won't allow me to fill with a color-- but rather a alpha aliased version of the color. 

My settings are: 

So AA is OFF. 

[firstdefence]

This is to do with position, make sure the selection is aligned to the pixel grid, check in the transform panel that position is not, say, Y: 3.35px change it to 3

You can see the effect if you use the arrow keys up and down and hold the option key to move the selection by point .1 increments.

[chippwalters]

Not sure that's the problem. Here's my snap settings:

and pixel selection:

[firstdefence]

Don't have Move by whole pixels checked, if the selection isn't aligned to the pixel grid it will keep moving it offset from the pixel grid, i.e. 5.69px 6.69px, 7.69px etc

[R C-R]

Also, make sure in Preferences > User Interface the "Decimal Places for Unit Types" is set to at least 1 decimal place for pixel units. If it is set to zero the Transform panel numbers will be rounded to the nearest whole pixel values.

Note that this setting only applies to the display of numeric values. Internally, everything is done at the maximum precision of the app, which is approximately to 8 decimal place precision. (It is an approximation because internally everything is done using binary rather than decimal numbers.)

[chippwalters]

@R C-R

Yep, it was already set to one. Any other ideas? Thanks.

[chippwalters]

Thanks everyone, for some reason today I can't replicate the problem. I'll file something here if I can replicate the recipe.