Plenty all depends on context. If you understand what is going on in the shader in order to make these old graphics look their best you’ll understand why it can still not be enough.
With some of the more advance CRT Shader Presets you may not even want or need to use such high internal resolutions in order to have pristine graphics because the Mask and Scanlines can handle most of that for you and the Shader can also perform upscaling internally.
So it’s like you’re trying to upscale an already highly upscaled image because the Smooth-ADV presets do this automatically, that’s why it’s easy to run out of memory.
I’ve tested my CyberLab Composite Pure and CyberLab N64 presets with N64 and I doubt I’ll ever want to or need to use anything other than 1X internal resolution in the core settings.
Same goes for Dreamcast/Naomi/Atomiswave and Sony PlayStation.
The DREZ presets are special HSM Mega Bezel Presets that ensure that this “overload” wouldn’t take place by forcing the image to 240p before it enters the rest of the shader pipeline. They’re in the
folder in HSM Mega Bezel Reflection Shader.
Since you’re new to this forum, I invite you to try my CyberLab Mega Bezel Death To Pixels Shader Preset Pack:
You’re already halfway there because you have HSM Mega Bezel Reflection Shader installed and setup.