Image distortion: contiguous black regions of .bmp images mysteriously filled with white

[Laine]

Hi all,

I'm completely new to E-Prime and have inherited some scripts from an experimenter (now-departed) for an eye-tracking study in which one slide is presented with a set of images (.bmp) on it, one per quadrant, then the next slide displays the exact same images but with one additional image per quadrant. Everything displays fine until the second slide, when both images in the top left quadrant (and only that quadrant) with significant contiguous regions of black suddenly have those regions of black partially filled with white as though some sort of smart autofill Photoshop-type operation were being applied. (Sorry, no screenshots at the moment.)

I'm not sure where to begin looking for the problem. Anyone have any ideas?

Laine

[Vinson, David]

Check "source color key" for the offending images (upper left quadrant), this setting permits partial transparency of a certain color. Maybe it's set for only one of your display objects?

--
You received this message because you are subscribed to the Google Groups "E-Prime" group.
To unsubscribe from this group and stop receiving emails from it, send an email to e-prime+u...@googlegroups.com.
To post to this group, send email to e-p...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/e-prime/4bccd33b-bf09-4e01-9508-d6f6ef3784ab%40googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
 
 

[Laine Stranahan]

Resolved! SourceColorKey was the problem: it was set to black (thus the black-to-white conversion (or rather black-to-transparent; I now understand SourceColorKey is for indicating a color (or color range?) to be rendered (partially?) transparent)), and for the offending images UseSourceColorKey was set to "Yes" instead of "No". (Non-offenders' had UseSourceColorKey set to "No".)

Many thanks!

Laine

To view this discussion on the web visit https://groups.google.com/d/msgid/e-prime/42FB73C9-2CE6-46CB-ABC2-007B4ADC2F20%40ucl.ac.uk.