// Rusting shader packs, version 1: the `cloud_layer` hook, the `clouds`
// program's file compiled with RUSTING_CLOUD_LAYER when its `scale` is
// below 1. `layer` starts at vec4(0, 0, 0, 1): rgb is light in front of
// the sky (premultiplied, linear HDR), a the sky's transmittance behind.
#ifndef RUSTING_CUSTOM_CLOUDS
void cloud_layer(CloudLayerInput i, inout vec4 layer) {}
#endif