R-Zero's Enlightened Flames (adapted by Wazabear) have untextured billboards

[Cymbasephona]

Candle meshes with attached flame billboards are not rendered properly with these shaders enabled -- the flames are "animated," and exhibit the behavior of billboards by facing the player, but appear completely black. This issue does not occur with OpenMW's "stock" shaders, and has been tested with and without post-processing.
If this can be fixed, Wazabear's patcher would be a good solution to the "candle-orbiting flames" problem caused by the sway effects.