Comments - morsik

File size if not the same thing as texture size in memory.
PNG must be decompressed to it takes 4M for every texture (RGBA) but dds can be store as compressed format (so it can take only - let's say - 1M per texture)

Normal ET doesn't contains 1024x1024 textures... with other variants (parallax, specular, displacement)

OpenGL3 or better compatible hardware