ID:2145688
 
Resolved
Parallel animations with pixel offsets often behaved wrongly.
BYOND Version:511.1355
Operating System:Windows 10 Pro 64-bit
Web Browser:Chrome 52.0.2743.116
Applies to:Dream Seeker & Webclient
Status: Resolved (511.1356)

This issue has been resolved.
Descriptive Problem Summary:

I use the following code to animate something so that it fades in while falling to the ground:

            animate(src, alpha = 255, time = 5)
animate(src, pixel_y = -16, time = 10, flags = ANIMATION_PARALLEL)


Expected results (recorded in DS):


The weird pixel shift mid-animation is probably another entirely different bug w/ animate().

Actual results (recorded in webclient):


I'll check this out. I did some fixes to animations on the webclient that may overlap with this bug, so it's possible it's fixed already.
It looks like both DS and the webclient are behaving wrong in this regard. I'm working on fixes for both.
Lummox JR resolved issue with message:
Parallel animations with pixel offsets often behaved wrongly.
Does not seem to be yet fixed in 1356.
Any chance you can narrow down a test case? I fixed a case just like the code you posted.
Related to id:2148033 ?