SceneKit particles behave differently in Metal, alpha "pops" for frame animation.

Originator:xybernic
Number:rdar://23285988 Date Originated:28-Oct-2015 00:07 AM
Status:Fixed Resolved:Yes
Product:Mac OS X, iOS, tvOS (using Metal) Product Version:Metal
Classification:Bug Reproducible:Always
 
In OpenGL the particles fade in and out from frame 1 to 4, nice and smooth.
In Metal the particles fade in and out from frame 1 to 2, some alpha popping going on, then fade in and out from frame 3 to 4.

Particles should behave exactly the same in Metal as in OpenGL!

https://dl.dropboxusercontent.com/u/6979623/metal%20particles%20bug/Bokeh-OpenGL.mov
https://dl.dropboxusercontent.com/u/6979623/metal%20particles%20bug/Bokeh-Metal.mov

https://dl.dropboxusercontent.com/u/6979623/metal%20particles%20bug/SceneKit%20Particle%20System%20-%20Modified.scnp
https://dl.dropboxusercontent.com/u/6979623/metal%20particles%20bug/BokehAtlas.png

Comments

Fixed

This has been fixed now in: • macOS Sierra 10.12 beta 1 • Xcode 8 beta 1

By xybernic at June 19, 2016, 5:49 p.m. (reply...)

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