question about performance

Hi everyone. i made paintings for my game with gimp. to improve the quallity of the paintings i made it very big (2000x1700 px) and when i put it in my game i chanched the size of the painings size to smaller size . is it effect the performace of the game? (frame rate, glicthes...)

You will probably have issues with memory usage rather than performance. See remember not to waste your memory

Why do you think its higher quality if you add a bigger image but then downscale it in-game?

An sprite of 128 x 128 looks good with an image that's 128 x 128, as good as an image that's 256 x 256. It may even look better due to down-sampling losing some details (blurry).

Why do you think its higher quality if you add a bigger image but then downscale it in-game?

An sprite of 128 x 128 looks good with an image that's 128 x 128, as good as an image that's 256 x 256. It may even look better due to down-sampling losing some details (blurry).

in gimp my paintings looks good but when i export it to C2 its looks blurred or with pixels and i dont know how to improve the quallity of the images.

Try the setting down-sampling set to low. The blurry images are due to texture mip-maps. Odd I know but setting to low gives the best results.