Hey to anyone having some problems in undertale in relation of two major conflicts who are, no image and no control/input response in win10 or even win8 I suppose, short and simple, I found a fix for it! and if you have been getting this problem, do this, find you Undertale folder (mines is in program:c/gog games, for example), when you are in go to "options.ini" file, You will have to open it in some kind of note bloc program, the default for win10 should be enough, then you have to change this exact line value "VertexBufferMethod=1" to zero, and that it's, close and save and there you have it, your undertale shouldn't bring any problems after this, I hope it help you, cya!