First your game has to be extracted (loadiine format) Then you find the config.json or something text file and find the information with the internal resolution render, then you edit it to something else. (It should normally say 1 just change it to 2) At least that is internal resolution render. If you mean like alter the size of the screen to make it bigger or wider, i haven't found that info yet. But i guess it would look like a common resolution scale ????X???? or whatever.
*Goes and find post about it*
http://gbatemp.net/threads/new-to-w...n-about-virtual-consoles.465095/#post-7188480
Those options doesn't make the game screen bigger, the render scale is a internal upscaler option to improve visual quality, and the bilinear is a pixel blending method to make the pixels less sharp or jagged and more blended or blur to be softer.I Open configuration_cafe.json and change
"RenderScale": 1 to "RenderScale": 4
and "Bilinear": 0 to "Bilinear": 1
Higher internal resolution does not enlarge the game screen on the display.One thing you can do right now is inject your own ROMs into Virtual Console titles. This is especially easy for DS titles which are simply a zip file containing the ROM you want to run. Getting Final Fantasy IV up and running was a doddle, and you can even force a higher internal resolution which is not an option Nintendo normally give us access to. Check out the difference in these shots!
Those options doesn't make the game screen bigger, the render scale is a internal upscaler option to improve visual quality, and the bilinear is a pixel blending method to make the pixels less sharp or jagged and more blended or blur to be softer.
If you read the link I posted in the quote you posted of mine, you would known that.
Higher internal resolution does not enlarge the game screen on the display.