Go to : Content/PortalTeleport/Blueprints/Portals/BP_SameLevelPortalTunnel

# Add

-Drag it to your target level and set the scale to all axis 2.

-Add another portal for connection with same settings

# Set

Portal Render Quality -> Portal render texture resolution.

Connected Portal -> Select target portal to go.

Texture Render Target -> Select different from the portal attached to the target tissue for processing.(if you stream on same time multiple portal you must choose different textures).