I decided to just post this snow (on surface) material here, even though I know that
anyone trying to use it will run into a number of problems. As stated in the forum, this is just a 'prototype', and it needs to be further
developed to become useful for the 'average' Microstation user. But I
guess if you found this post, you are are not just an "average user", and maybe you
will get some bright ideas on how to improve the material and make it be more useful:
some issues (some also mentioned in the forum thread):
- The material is based on the slope gradient functionality. It works well, but it is not easy to control 100%
- The snow material is using displacement to give the snow some
thickness. The material requires high displacement settings if the snow
is close to the camera, and will render very slow
- The scene contains two versions of the material: - one snow+metal
combo, and one with snow only.(transparent background). Both materials allows snow only on surfaces facing upwards. The 'snow only' version might be
more useful, but requires that you duplicate the geometry you want to carry snow, and uses another base material to be visible on the geometry that will not be covered in snow. The snow+metal version is just an example, and could
have been a snow+wood or a snow+rock material.
- for the combo material is hard to find the correct gradients that makes the transition from metal to snow look good.
- for large distance renderings (buildings/landscep in the
background etc), you might get away with using the material with
displacement = 0. I have not tested this.
- The material uses gradients/textures in multiple channels, it will
be to detailed to explain each one - and I guess you will understand
how it works anyway. Just post questions if anything is unclear
regarding this, and I'll help if I can.
this example rendering uses 1 material only. the snow is only "growing" on upwards facing surfaces, a metal surface becomes visible on steep surfaces. Both surface types are defined in the combo material.