Two hours is exam length, and it is the block most students use to simulate one. Long enough that the session becomes the main event of the day rather than something squeezed between other things.
Set for 120 minutes and ready to start. Good for a long study session, an exam simulation, or a deep-work morning.
Two hours is the standard length of a written exam, which is why it is the block students use to rehearse one. Sitting the full duration in a single unbroken stretch is the part that needs practising, and it is the part a timer genuinely helps with.
Best suited to exam candidates and long-form deep work.
Yes, and this page sets one unbroken block, which is what exam practice needs. If you would rather break it up, switch to Pomodoro and pick an interval.
SAND. Bottom pile is graded like the top one — no light/shadow split; its colour follows the time of day. Cone lift is what separates the raised pile from the flat bed behind it.
FALLING SAND. Ported from the app (lib/hourglass/hourglass_painter.dart) — accelerating grains, same constants. Defaults ARE the app's values.
PILE GATHERING. The sand spreads evenly first, then a pile starts small and builds. Start = when the mound begins, Ramp = how much more drain until it is the full solved cone.
Copy tuned stream back to me:
Horizon Y = 0.4475 — send me this number to bake it.
SUN — edit one key at a time.The rendered sun blends between these three by the sun's height, so whatever you set here is what shows at that time of day. Scrub Day time to preview.
Copy tuned keys back to me:
MOON — all parameters.Painted disc (plates/moon-tex.png) plus a shader halo and sky spill. Rises 21:45, sets 05:30.
Copy tuned moon back to me:
Place=1, then drag the sun/moon in the sky — it edits the phase you're viewing (scrub Day time to reach it). Moon shows today's real phase.
These edit the selected Time-of-day phase. Mid Day is the anchor (identity).
The Rim light (in Glass optics, locked) auto-scales per phase — strong at night, dim by day — so the hourglass stays the hero.
LOCKED — 100% outline
Set Show glass edge = 1, then drag the white dots(anchors) or blue dots (curve handles) — on either side; the two halves stay mirrored. Drag anywhere off a point to move the whole hourglass. 7 nodes per side: 5 around the top, 5 around the bottom, 1 neck.R restores the locked outline · Shift+R reverts to slider-driven.
Drag markers to shape the sea. Double-click a marker to flip it straight ⇄ curved (square = straight corner, circle = curve), double-click open water to add one, right-click one to remove. The outline passes exactly through every marker.
H panel · L locked params.
DAY plate — LOCKED. Everything (outline · sand · optics · water) is baked. This is the daytime look, used between sunrise and sunset. Reopen the locked menu only to re-tune. Next: the other phase plates + rendered sun/moon.
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