[JTB]

http://simul.co.uk/
Simul CloudWright: a technology for creating stunningly realistic skies for games and media. CloudWright uses the physics of light to create high-dynamic range, 360-degree panoramic skies
CloudWright Standalone Sky Tool Features

* physically correct time-of-day sky coloring
* 3D volumetric clouds
* anisotropic haze and fog
* cumulus, stratus and cumulonimbus cloud coverage
* interactive rendering
* HDRI
* cloud rendering to .hdr images, .jpeg, transparent .tga and .dds cubemaps
* combined or separate sky gradient rendering to .jpeg, .hdr and .tga

[Bubbaloo]

* physically correct time-of-day sky coloring

Where have I heard that before?

[Hervé]

is it just me... I look at the clouds.. and they appear pretty blurred and lack details... no..?

[deadalvs]

and... they have a stock of 100`000 units on their online store... see yourself by clicking the buy button ...

[simmsimaging]

is it just me... I look at the clouds.. and they appear pretty blurred and lack details... no..? Confused

No, it's not just you. I thought the same.

b

[Hybaj]

It's buggy like hell and I too do not like the output.

It has a very looong way to become photo-realistic as Terragen 2 which kicks some major ass in the cloud department.