Dosbox-x / Reshade - white bars left and right

It's probably an issue of Dosbox-x, so just as a remark: I already posted the following in the Dosbox-x github:When using the current (6.3.3) Reshade with the current (2025.02.01) Dosbox-x SDL2, the black bars left and right (4:3 ratio of DOS) turn into white (with ghosting of the Reshade interface; however a screenshot shows only black bars). This happens both with OpenGL and Direct3D9. In Dosbox-Staging, the bars remain black.

This typically indicates the application is not clearing the framebuffer every frame, before rendering. So the image from the previous frame stays visible in the areas that the application is not redrawing (the borders), resulting in the ghosting (since the ReShade overlay is drawing there). ReShade is not clearing the framebuffer of the application itself, it relies on the application to do so.