Hey Zaro, there is a way to add more skyboxes in the M&B, also adjust the enviroment light strenth, color, and shadow direction.
Here is the detail steppes to get unlimited colorful sky : (the post below is half in English and half in Chinese, but i think you can understand it)
http://bbs.mountblade.com.cn/viewthread.php?tid=36944
you need to modify the Texture\skybox.brf
but the limit of skybox is in the DATA\skyboxes.txt
the old original tech post is here by Yoshiboy:
http://mbx.streetofeyes.com/index.php?topic=143.msg17596
the means of those data:
skybox mesh 材质名
skybox flags 标志位(整数)
sun_bearing (1 float) 日光朝向(1个浮点数)
sun_elevation (1 float) 日光高度(1个浮点数)
sun flare strength (1 float) 日光耀眼程度(1个浮点数)
sun_color (3 floats) 日光颜色(3个浮点数)
sky_color, (3 floats) (not used) 天空颜色...(无用)(3个浮点数)
ambient_color,(3 floats) 空气颜色(3个浮点数)
fog distance, (1 float) 视距(1个浮点数)
fog color, (1 integer) 视距边缘颜色(整数)
Skybox flags are as follows:
sf_day = 0x00000000, 白天
sf_dawn = 0x00000001, 黄昏
sf_night = 0x00000002, 晚上
sf_time_mask = 0x00000003, 时间遮罩
sf_cloud_mask = 0x000000f0, 云遮罩
sf_cloud_bits = 4, 云
but the flags looked not finished...... we asked Amargan and waiting for the replies......
here are some examples:
the cloudy moon night in snowland
skybox_night_1 18 152.000000 38.000000 0.000000
0.060000 0.074118 0.095294 0.000000 0.000000 0.000000 0.015686 0.015686 0.047059 500.000000 4279574581
but it looks a little too bright.
the dusk in snowland
skybox_sunset_3 17 170.000000 18.000000 0.700000
0.922000 0.428500 0.158000 0.000000 0.000000 0.000000 0.050196 0.073725 0.139608 300.000000 4287406765
the color is too red ---- you can see the strenth and color is very important
and you may erase the origenal sun, left the place to the new one by system
skybox_clear 64 95.000000 78.000000 0.900000
1.122000 1.028500 0.918000 0.000000 0.000000 0.000000 0.050196 0.073725 0.039608 500.000000 4287406765