Soft sprites moving in a clean Area

[Rybags]

You then have to either know when sprites will interact or have to test for it.

 

Testing for possible interaction adds time in itself.

 

Testing for interaction with background is even more involved. So, all these optimisations in fact come with a built in price, so the gains won't be as good as you might think.

[Heaven/TQA]

Jose... don't fear to grab an assembler and play around yourself... you really have the knowledge and the passion... come to the dark side...

[sack-c0s]

yeah - we'll teach you

[popmilo]

When some objects overlap, then you need full LDA,AND,ORA,STA or shorter LDA,EOR,STA but then the overlapping parts will have strange changing colours.

LDA, ORA, STA also works nicely, and if 11 is bright color you get nice bright effects where two sprites overlap.

And it doesn't matter if background is 00 or 01...