Outerra forum

Outerra Engine => Development screen shots and videos => Topic started by: cameni on July 11, 2010, 05:51:45 pm

Title: Stars
Post by: cameni on July 11, 2010, 05:51:45 pm

Few images showing early rendering of stars. It uses actual star database with >100,000 stars, currently rendering stars from apparent magnitude 8.0. The sky is not properly aligned according to the time, mainly because there's no concept of game time yet.

(http://www.outerra.com/shots/k289.jpg) (http://www.outerra.com/shots/k289.jpg)
(http://www.outerra.com/shots/k290.jpg) (http://www.outerra.com/shots/k290.jpg)

Atmosphere rendering needs to be reworked because there are several bugs and imprecisions showing up.
Additionally there's a rather big difference in luminance of stars and atmosphere, and in order to see both in full range we'll need an adaptive HDR, or some hack for the moment.

For low levels of light also the color perception changes, so these colors on the image below aren't proper either.

(http://www.outerra.com/shots/k291.jpg) (http://www.outerra.com/shots/k291.jpg)

The terrain is darker as it should be also because the atmosphere rendering currently doesn't account for secondary light scattering, hopefully this will be solved with the new rendering model as well.

Title: Stars
Post by: MatthewS on July 11, 2010, 07:41:46 pm

Incredible as always!  

Would be interesting to see an (accelerated) day/night cycle video one day!  

Love the visible atmosphere layer (shots 1/2) and the silhouetted last shot. I guess on full moon nights the world would be lit with moonlight?

Title: Stars
Post by: cameni on July 12, 2010, 01:21:07 am

Quote from: MatthewS

I guess on full moon nights the world would be lit with moonlight?

Yes, once there will be the Moon :)
But what it needs is also a postprocess color mapping to match the human color perception at different luminance levels and light spectrum. The colors now are a bit like what you get with camera taking raw shots, without proper white balancing.