Our game is designed in 1.5k resolution, so max size of image covering the screen is 1536*1152. There are around 600-900 textures of varying sizes per scene in our game which run without crashes on devices having more than 1.5GB RAM. The game crashes due to less memory on devices which have RAM lower than 1.5 GB. Currently the game needs around 800 MB to 1.1 GB of free RAM to work. In future the number of textures to be loaded per scene are going to be increased. What steps can we take so that the image quality doesn't reduce in high resolution devices and also support low end devices which have RAM as low as 1 GB.
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