diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index 36ff86abd..d83ee710d 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -1699,7 +1699,7 @@ static void HWR_ProcessSeg(void) // Sort of like GLWall::Process in GZDoom
 					if ((rover->fofflags & FOF_TRANSLUCENT && !(rover->fofflags & FOF_SPLAT)) || rover->blend)
 					{
 						blendmode = rover->blend ? HWR_GetBlendModeFlag(rover->blend) : PF_Translucent;
-						Surf.PolyColor.s.alpha = (UINT8)rover->alpha-1 > 255 ? 255 : rover->alpha-1;
+						Surf.PolyColor.s.alpha = max(0, min(rover->alpha, 255));
 					}
 
 					if (gl_frontsector->numlights)
@@ -1822,7 +1822,7 @@ static void HWR_ProcessSeg(void) // Sort of like GLWall::Process in GZDoom
 					if ((rover->fofflags & FOF_TRANSLUCENT && !(rover->fofflags & FOF_SPLAT)) || rover->blend)
 					{
 						blendmode = rover->blend ? HWR_GetBlendModeFlag(rover->blend) : PF_Translucent;
-						Surf.PolyColor.s.alpha = (UINT8)rover->alpha-1 > 255 ? 255 : rover->alpha-1;
+						Surf.PolyColor.s.alpha = max(0, min(rover->alpha, 255));
 					}
 
 					if (gl_backsector->numlights)
@@ -3095,7 +3095,7 @@ static void HWR_Subsector(size_t num)
 										   false,
 					                       *rover->bottomheight,
 					                       *gl_frontsector->lightlist[light].lightlevel,
-					                       rover->alpha-1 > 255 ? 255 : rover->alpha-1, rover->master->frontsector,
+					                       max(0, min(rover->alpha, 255)), rover->master->frontsector,
 					                       HWR_RippleBlend(gl_frontsector, rover, false) | (rover->blend ? HWR_GetBlendModeFlag(rover->blend) : PF_Translucent),
 					                       false, *gl_frontsector->lightlist[light].extra_colormap);
 				}
@@ -3141,7 +3141,7 @@ static void HWR_Subsector(size_t num)
 											true,
 					                        *rover->topheight,
 					                        *gl_frontsector->lightlist[light].lightlevel,
-					                        rover->alpha-1 > 255 ? 255 : rover->alpha-1, rover->master->frontsector,
+					                        max(0, min(rover->alpha, 255)), rover->master->frontsector,
 					                        HWR_RippleBlend(gl_frontsector, rover, false) | (rover->blend ? HWR_GetBlendModeFlag(rover->blend) : PF_Translucent),
 					                        false, *gl_frontsector->lightlist[light].extra_colormap);
 				}