drawBuffers

glDrawBuffers — selects the colour buffers the bound framebuffer draws into. Pass [GL_NONE] to make a depth-only framebuffer complete on desktop GL (which otherwise reports FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER for the default GL_COLOR_ATTACHMENT0). Requires GLES3+ / WebGL2 / GL3+; no-op where unsupported (callers gate on supportsSizedTextureFormats).