software's colors pop out more because of the game's palette of 256 colors (so the game has to get creative with the colors it uses), opengl has infinite colors, and while that might seem like a good thing (i mean, some do prefer that), it means opengl's colors will come out more muted and less vibrant, specially with shaders off.
That's a very easy fix. Getting it to look 1 to 1 the same as Software isn't doable right now as far as I'm aware (though there are some mods that make an attempt IIRC), however you can enhance the OGL visuals to closer to your personal tastes by using a program such as Reshade. Regarding the colors looking less vibrant, you could simply bump up the saturation and/or contrast a bit to get it looking more how you want it.
or use tsourdt3, it have an option to enable software shading in opengl
Sprite flickering? I’ve never heard of that.
I never even heard of it before, and I haven't seen it before.
Could you show us a video/gif?
Yeah, this sometimes happens to me when I'm in Castle Eggman Zone, mainly act 2
You made us think it happened throughout the entire game.
That never happened to me. Maybe it's something on your end.
Oh, that happens? Weird. I'll check this on SW mode.
