What about DB folder in gamma?

[tonfilm]

for temporaray textures or browsing images you can use TextureReader and the MipMap node triggered once in a cache region, this will not use the asset data base.

@AKa-visuals

when you close the app to flush this cache to avoid big size app folder.

this is not possible, because the app doesn’t know which images are needed on the next start and which are temporary. but you can delete the content of the folder by hand, i think.