# Shadow bitmapcanvas

**URL:** <https://forum.kirupa.com/t/shadow-bitmapcanvas/315265>\
**Category:** Uncategorized\
**Created:** [October 21, 2010, 10:58am UTC](https://forum.kirupa.com/t/shadow-bitmapcanvas/315265 "2010-10-21T10:58:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Ageren](https://avatars.discourse-cdn.com/v4/letter/a/82dd89/32.png) [@Ageren](https://forum.kirupa.com/u/Ageren)\
**Post date:** [October 21, 2010, 10:58am UTC](https://forum.kirupa.com/t/shadow-bitmapcanvas/315265/1 "2010-10-21T10:58:23Z")

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Hello all,

I’m working on a tile based game, inspiredb by tutorials from the book “the essential guide to flash games”.  
Please have a look at [www.ziccidus.nl/sensitive](http://www.ziccidus.nl/sensitive)

– edit: by the way, the game idea is by no means mine, but i want to replicate the old game “sensitive” from the c64 ([http://www.youtube.com/watch?v=xU\_lOKhc0go](http://www.youtube.com/watch?v=xU_lOKhc0go)) for learning purposes 🙂

I want to add shadows to all objects that stand in the water.  
However, since I want to keep my sprite count to a minimum, I have put all objects that don’t do anything in a background bitmap.

The best solution I can think of is to have:

1. a background bitmap (won’t change during level)
2. a background shadows bitmap (won’t change during level)
3. a sprite layer
4. and a sprite shadow layer  
at every screen, but this seems like a lot of work for just shadows.

Does anyone have a better idea on how to go about this?

Kind regards!  
Ziccidus