Range (max = min + range). Isolate specific bounces!
🚀 Auto-focus & Visualization
The default aperture is small, keeping most of the scene in focus.
Lower the F-stop to introduce depth-of-field blur and reduce the in-focus range.
Click any object in the scene to trigger autofocus.
Green = traditional planar focus, Red = Scheimpflug (tilt-shift). Tolerance = pixels of acceptable blur.
☁️ Volume (Particilating Media)
Required for environment fog and volumetric spheres. Only preliminary volumetric support is included, due to the high computational cost of real-time volumetric path tracing.
Based on Ray Tracing Gems II - Tilt-Shift Rendering Using a Thin Lens Model
Proper Scheimpflug implementation from RTG II Ch.31. Define focal plane by 3 points. When the intended focal plane is about perpendicular to the image plane, we see expected artifacts, due to the geometry setup causing intersection extremely far.
Shows: RGB spheres, axes, and focal plane triangle. Hover to highlight, click and drag to manipulate.
How it works:
• The gizmo (triangle) defines the focal plane in 3D space.
• Hold on RGB spheres to rotate the focal plane.
• Hold LMB on the center of the triangle to translate it in XY-plane (parallel to the image plane);
• Hold RMB on the center of the triangle to translate it in XZ-plane (perpendicular to the image plane);
• First increase the aperture size (smaller F-stop), then play with the gizmo and see how the depth of field changes in action.
• The artifact you see when the focal plane is perpendicular to the image plane: this is expected behavior, since this case involves intersection at infinitely far.
🌈 CHROMATIC ABERRATION & EFFECTS ⭐
Wavelength-dependent IOR creates rainbow dispersion through glass.