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22 quick stories on the rack · #rendering · TechHow Game Engines Fake Volumetric Light Beams
Game engines use clever shortcuts to fake god rays and light shafts. Here's exactly how they decide what to ca…
Why Game Engines Delete Your Bullet Holes
Decals vanish under memory pressure, not on a timer. Engines run a quiet cost-benefit calculation, age, distan…
How Games Fake Infinite Mirror Reflections
Games can't render true infinite mirror loops. The trick engines use to decide where to stop is more interesti…
How Game Engines Fake Water Caustics
Real-time water caustics would melt any GPU if done honestly. This is the approximation trick engines actually…
Game Engines Animate Wind-Blown Trees Without Physics
Vertex shaders, painted weights, and invisible wind zones do the heavy lifting, no physics simulation required…
Game Engines Fake Grass Animation Brilliantly
No game simulates every blade of grass. Engines use culling, sine waves, and LOD tricks to fool your eyes at a…
Why Game Engines Struggle to Render Transparent Surfaces
Transparency in 3D games breaks in specific, predictable ways. The sorting tricks engines use, and why none of…
Why Game Engines Split UI and Scene Frame Budgets
Game engines give UI and 3D scenes separate rendering budgets, a mechanical choice that keeps menus crisp and …
How Game Engines Recalculate Shadows When a Light Moves
Moving one torch can cost your GPU almost nothing or eat half your frame budget. The shadow-recalculation logi…
Camera Angle and GPU Render Cost Explained
Same scene, different angle, wildly different frame rates. The geometry behind why your GPU sweats harder the …
How Game Engines Triage Lighting to Save Frame Rate
When frame rate drops, game engines follow a strict priority stack, cutting the most expensive lighting first,…
How Game Engines Fake Water Reflections
That lake reflection isn't live, it's a snapshot, blended and timed to fool you. A breakdown of the update log…