I would like to present you totally new way to create sky lighting mainly for arch-viz exterior usage but it is good for interiors too because it has some specific options.
Advanced Sky for Cinema 4D :
Cloudy sky simulation with soft transition from clear to cloudy sky included all three PRG, Hosek Wilkie and Preetham models
Sun height, Sky rotation with individual HDRI map rotation connected to global Sky horizontal rotation
Many options to change color of Sky models and HDRI maps like temperature, tint, saturation, exposure, hue...
Individual control for Sun parameters
Ground diffusion light which can improve brightness of polygons that are towards ground with included GI ( so it looks real not flat )
Horizon maps with included alpha - they can be scaled, moved with repeating effect
Special ground plane for HDRI maps which doesn't have included ground - fully customizable
PRG light color compensation to looks the same as Hosek-Wilkie
HDRI's mixing - you can mix two HDR maps using different options for them !
Camera Exposure and White Point was additionally added to have better control on scene colors.
HDRI reflection only object for creating custom reflections. It can be scaled by different ways and customized with color corrections.
Tinting for all HDRI maps is now available. It fully works with other color corrections.
D65 color correction as option was added to all HDRI maps. This is workaround for C4D issue while using ACEScg color space - HDRI maps looks wrong by default.
Special Horizon reflection only map with cast shadow option.
Advanced tabs for controlling Reflection and GI impact.
Reset color option for individual Ground and Tint corrections.
Extended parameters which works above original 100% to create specific effects like saturation, color corrections.
Available : https://archviz4d.gumroad.com/l/pdmwo
Self-explanation manual :