Million Particle Portals in Visual Effect Graph
VFX Graph is the new way to draw particles on the GPU, so let's push it to the limit and render a million particles.
Portals | Part 6 - Portal Recursion
In Portal, you can see portals in portals, which requires recursively mapping the view from one portal in another portal.
Portals | Part 5 - Placing Portals
Firing portals and snapping them to the edge of a wall without overhangs involves a lot of fiddly raycasts. Plus, let's shoot portals through portals, Narbacular Drop-style.
Portals | Part 4 - Portal Momentum
When an object travels through one portal, its momentum must be conserved. Plus, we need to render a clone whenever the object is partway through a portal.
Portals | Part 3 - Matrix Clipping
Using an oblique projection matrix to set up a view frustum is crucial for properly culling objects behind the portal plane without culling anything in front of it.
Portals | Part 2 - Stencil-based Portals
Rendering the view from behind one portal on the surface of its paired portal requires a bunch of space transformations and stencils.
Portals | Part 1 - Spyro Skyboxes
Spyro renders the skybox of an upcoming level inside the portal for that level, then swaps the active skybox as you cross its threshold.
Portals | Series Introduction
In this series of articles, we'll discuss portal rendering techniques for Spyro the Dragon and Portal.