DefaultEngine.ini BaseEngine.ini
This section:
[/Script/Engine.VirtualTexturePoolConfig]
; Configure VT physical memory pools. Useful commands to set these:
; “stat virtualtexturing” show dynamic use of the VT system including the cache loads
; “r.VT.ListPhysicalPool” list in-depth details on the allocated physical pools
; “r.VT.DumpPoolUsage” list in-depth details on asset usage of physical pools
; The default pool size and behavior is set here. It can be overridden in project config files.
+Pools=(SizeInMegabyte=64, bAllowSizeScale=False, bEnableResidencyMipMapBias=True)
; Specific pools can be configured per tile size or format in project config files. Examples commented below:
;+Pools=(Formats=(PF_DXT1), SizeInMegabyte=36, bAllowSizeScale=True, ScalabilityGroup=1, bEnableResidencyMipMapBias=False)
+Pools=(Formats=(PF_DXT5, PF_BC5, PF_DXT1), SizeInMegabyte=100)
Your pool can be set on the bottom.
You like want a line like this:
+Pools=(Formats=(PF_DXT5, PF_BC5, PF_DXT5), SizeInMegabyte=1000)