Virtual Texturing

Demonstration of Streaming Virtual Texturing and Runtime Virtual Texturing, which is new to UE4 in 4.23.

Shows how use runtime virtual texturing to:

• render landscape materials to a virtual texture
• use materials that sample from the landscape's virtual texture to blend into the terrain
• create a decal-like material that renders into the landscape's virtual texture. Note this is not an actual decal, it is just a static mesh that renders into a virtual texture. The resolution of the this decal like object is determined by the Runtime Virtual Texture asset's parameters.

Useful CVARs and commands are:

• r.VT.Borders 1 to see Streaming Virtual Texture tiles
• r.VT.Flush to see changes to previous border command
• stat virtualtextures

See also:

• Virtual Texturing

Troubleshooting

I've had some problems with the RuntimeVirtualTexture level crashing in 4.23. I reported the crash to Epic. In the meantime, you can try to workaround by trying again (the crash doesn't happen all the time for me) or by first opening M_PickupLandscape material, moving a node, and hitting save before opening RuntimeVirtualTexturing level (I have no idea why this would make any difference, but it did for me).