Nature and effects
Learning paths through this topic
Let fog creep in so the player loses sight at an exact distance
A fog slider that you turn from a little to a lot jumps at the start and then seems to do nothing. The player should lose sight of the far trees, then the near ones, at a steady pace, and you should be able to say how far they can see. Here is how.
Clear mist off a puzzle board from where the player taps, with a soft edge
Hidden pieces under fog are a classic way to reward a tap. The fog should not blink out tile by tile in a hard square, and it should not pop back when a second tap clears a place nearby. Here is how to clear a widening circle with a soft edge that combines cleanly with other taps.
Leave footprints in snow that fill in under new snowfall, one per stride
A trail of footprints tells the player who walked here and when. Prints stamped once per frame bunch up when the game is slow and leave gaps when it is fast, and prints that never fade make a snowfall look painted on. Here is how to space them evenly and let the weather slowly erase them.
Make a frog hop to a lily pad that is still bobbing on the water
In a pond puzzle the frog must land exactly on its target. A jump aimed at where the pad was ends in the water or a visible snap at the end. Different distances also need different heights and times or they all look the same. Here is a hop that adapts and always arrives on the pad.
Let frost spread from the edges of a window and clear where a hand touched
A freezing room is told by the window: frost grows from the corners towards the middle, and a hand wipes a clear patch that slowly closes again. The usual shortcut, a fading white layer, shows none of that. Here is how to get the growth, the uneven edge and the patch that refreezes, with melt faster than frost.
Ripen a fruit from green to red without a muddy brown in the middle
Blending two colours by averaging the numbers gives a dull, dark middle: green and red make something like old mud. In a farm game that colour shows up right when the player wants a lively sign of progress. Here is how to blend so the middle is bright, and how to place the stops of the colour journey.
When the particle pool is full, drop the piece nobody will miss
Phones can only draw so many sparkles. When the limit is reached, the usual quick fixes either ignore the new effect or overwrite the oldest piece, and both make visible holes: a tap that does nothing, or a long smoke puff that suddenly vanishes. Here is a better rule for who has to leave.
Let a plant grow only on the days it was watered, even after skipped days
In a story where the player tends a garden between scenes, the plant should show the care it got, not just the time that passed. A counter that adds a day every frame is wrong when days are skipped, saved or replayed. Here is a way to get the size from the log of watering alone, so it is always right.
Let a garden pet wander the pen, stop to graze and pick real new spots
A sheep or hen that picks a random spot every few seconds often picks one right beside itself, shuffles two steps and stops, over and over. Or it walks to the fence and stands in it. Here is a short routine for a pet that moves with purpose, rests in between, and always has somewhere worth going.
Let grass or bushes part as the player walks through and straighten up slowly
Plants that react to the player make a world feel solid, but a push that is the same everywhere looks flat, a blade right under the player has no side to bend to, and plants that snap back instantly look like rubber. Here is a push with soft edges, a fair choice for the middle, and a slow recovery.
Grow a plant from its roots, with a small pop when it levels up
A seedling that grows by scaling its picture seems to rise out of the ground in the middle of the pot, or sink into it. And a quick tap-tap upgrade makes the plant snap back before it grows again. Here is how to keep the roots in place and make repeated growth look continuous.
Work out when the tide is high and when boats may enter the harbor
A harbor game that follows real hours needs a tide that rises and falls on a believable schedule, not once per day, with higher and lower tides over the weeks. Players then want to know when the next high water comes. Here is a small formula for the water level and a way to find the times that matter.