Not enough information ... and you should really be asking this on the Artlantis / Abvent forums anyway if you really want (1) an answer and (2) to influence any change in neon behavior.
Your precise version/build of Artlantis is essential information, as is your platform, the neon settings, and the complete photorendering settings. Please post all of that over here:
http://www.artlantis.com/index.php?page=support/forum/liste&fid=atl_shaders_us
Thanks,
Karl
AC 28 USA and earlier • macOS Sequoia 15.3.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB