On 21-3-2016 7:18, bocovp wrote:
> I want to render two sheets of paper (one on top of another).
> See e.g. the following images:
>
http://3.bp.blogspot.com/-Z_xcZG_0OpM/T6QQOa_85RI/AAAAAAAAY2Y/SfjXLhylBc8/s1600/IMG_5882.JPG
>
https://t2.ftcdn.net/jpg/00/67/30/75/240_F_67307554_13kmP5SBUF36d3HrbcR6O0swgZcv3Hhu.jpg
>
> I want to get this tiny shadow which is formed by the topmost sheet on the
> bottom one.
> Since the distance between the sheets is VERY small, I cannot just place two
> meshes with different z-coordinates.
>
> I thought of using some multilayered texture:
> 1. bottom sheet
> 2. some shadow layer (???)
> 3. top sheet
>


>
>
>

It seems to me that placing two meshes, slightly offset vertically, is 
the best method and not difficult to build. A challenge would be if the 
sheets were wrinkled but I guess that is not your intention. The layered 
texture approach does not seem to me a very good solution. Personally, I 
always used the first approach in the past.

-- 
Thomas

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