watch this

Very cool!!! The water effect looks really cool!!! very nice use of fast tile-level scroll to make it look like waving, I'm impressed!

That is a great effect, I just wonder : Are those waves full blown characters or are they fiddling with the color tables during run-time? That might be a litle slower but could be more flexible if other bg titles could be used

Since you like water waves and just to blow my own horn...
Here is a water/wave effect I once created but never released: https://youtu.be/8z-MUJTk10Y

If you want to run this on your won HW you can download the rom here
https://github.com/turbor/MSXSinusDemo/raw/master/msxsindm.rom

@PingPong: sorry for hi-jacking your post :)

So the wave effect is inspired by Hero/Pitfall 2. It is done with 2 sets of 64 pre-defined tiles (one set for the top wave, one set for the bottom wave).

The 64 tiles are based on 8 steps of scrolling (with a different TGP) x 8 steps of wave height (with a different TC). This allows to achieve the effect with only 2 x 32 outs in total per VBlank.

The "green" area is experimenting with sprites which are a combinations of tile based sprites (the colored background, one color per line, pre-shifted) & Hardware sprites (the outline). This allows having multicolored sprites for enemies while still having 2 colors for the main sprite, without flickering. The only constraint is that those enemies can only move over a "uniform" background which would work with something that looks like SMB and the right level design.

Very cool Maggoo! Are you still working on this? or was that just a test?

It's just a test put together in a matter of hours, nothing close to a full game.