diff --git a/GPU/GPUCommon.cpp b/GPU/GPUCommon.cpp
index 713e4c4120..262ed460a7 100644
--- a/GPU/GPUCommon.cpp
+++ b/GPU/GPUCommon.cpp
@@ -161,7 +161,7 @@ const CommonCommandTableEntry commonCommandTable[] = {
 	// These must flush on change, so that LoadClut doesn't have to always flush.
 	{ GE_CMD_CLUTADDR, FLAG_FLUSHBEFOREONCHANGE },
 	{ GE_CMD_CLUTADDRUPPER, FLAG_FLUSHBEFOREONCHANGE },
-	{ GE_CMD_CLUTFORMAT, FLAG_FLUSHBEFOREONCHANGE, DIRTY_TEXTURE_PARAMS },
+	{ GE_CMD_CLUTFORMAT, FLAG_FLUSHBEFOREONCHANGE, DIRTY_TEXTURE_PARAMS | DIRTY_DEPAL },
 
 	// Morph weights. TODO: Remove precomputation?
 	{ GE_CMD_MORPHWEIGHT0, FLAG_FLUSHBEFOREONCHANGE | FLAG_EXECUTEONCHANGE, 0, &GPUCommon::Execute_MorphWeight },
diff --git a/GPU/Vulkan/FragmentShaderGeneratorVulkan.cpp b/GPU/Vulkan/FragmentShaderGeneratorVulkan.cpp
index 7b2ee0b61c..08327ec747 100644
--- a/GPU/Vulkan/FragmentShaderGeneratorVulkan.cpp
+++ b/GPU/Vulkan/FragmentShaderGeneratorVulkan.cpp
@@ -177,8 +177,18 @@ bool GenerateVulkanGLSLFragmentShader(const FShaderID &id, char *buffer) {
 
 			if (doTextureProjection) {
 				WRITE(p, "  vec4 t = textureProj(tex, %s);\n", texcoord);
+				if (shaderDepal) {
+					WRITE(p, "  vec4 t1 = textureProjOffset(tex, %s, ivec2(1, 0));\n", texcoord);
+					WRITE(p, "  vec4 t2 = textureProjOffset(tex, %s, ivec2(0, 1));\n", texcoord);
+					WRITE(p, "  vec4 t3 = textureProjOffset(tex, %s, ivec2(1, 1));\n", texcoord);
+				}
 			} else {
 				WRITE(p, "  vec4 t = texture(tex, %s.xy);\n", texcoord);
+				if (shaderDepal) {
+					WRITE(p, "  vec4 t1 = textureOffset(tex, %s.xy, ivec2(1, 0));\n", texcoord);
+					WRITE(p, "  vec4 t2 = textureOffset(tex, %s.xy, ivec2(0, 1));\n", texcoord);
+					WRITE(p, "  vec4 t3 = textureOffset(tex, %s.xy, ivec2(1, 1));\n", texcoord);
+				}
 			}
 
 			if (shaderDepal) {
@@ -186,29 +196,72 @@ bool GenerateVulkanGLSLFragmentShader(const FShaderID &id, char *buffer) {
 				WRITE(p, "  uint depalShift = (base.depal_mask_shift_off_fmt >> 8) & 0xFF;\n");
 				WRITE(p, "  uint depalOffset = ((base.depal_mask_shift_off_fmt >> 16) & 0xFF) << 4;\n");
 				WRITE(p, "  uint depalFmt = (base.depal_mask_shift_off_fmt >> 24) & 0x3;\n");
-				WRITE(p, "  bool bilinear = (base.depal_mask_shift_off_fmt >> 31) == 0;\n");
+				WRITE(p, "  bool bilinear = (base.depal_mask_shift_off_fmt >> 31) != 0;\n");
 				WRITE(p, "  vec2 fraction = fract(%s.xy);\n", texcoord);
 				WRITE(p, "  uvec4 col; uint index0; uint index1; uint index2; uint index3;\n");
 				WRITE(p, "  switch (depalFmt) {\n");  // We might want to include fmt in the shader ID if this is a performance issue.
 				WRITE(p, "  case 0:\n");  // 565
 				WRITE(p, "    col = uvec4(t.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
 				WRITE(p, "    index0 = (col.b << 11) | (col.g << 5) | (col.r);\n");
+				WRITE(p, "    if (bilinear) {\n");
+				WRITE(p, "      col = uvec4(t1.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
+				WRITE(p, "      index1 = (col.b << 11) | (col.g << 5) | (col.r);\n");
+				WRITE(p, "      col = uvec4(t2.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
+				WRITE(p, "      index2 = (col.b << 11) | (col.g << 5) | (col.r);\n");
+				WRITE(p, "      col = uvec4(t3.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
+				WRITE(p, "      index3 = (col.b << 11) | (col.g << 5) | (col.r);\n");
+				WRITE(p, "    }\n");
 				WRITE(p, "    break;\n");
 				WRITE(p, "  case 1:\n");  // 5551
 				WRITE(p, "    col = uvec4(t.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
 				WRITE(p, "    index0 = (col.a << 15) | (col.b << 10) | (col.g << 5) | (col.r);\n");
+				WRITE(p, "    if (bilinear) {\n");
+				WRITE(p, "      col = uvec4(t1.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
+				WRITE(p, "      index1 = (col.a << 15) | (col.b << 10) | (col.g << 5) | (col.r);\n");
+				WRITE(p, "      col = uvec4(t2.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
+				WRITE(p, "      index2 = (col.a << 15) | (col.b << 10) | (col.g << 5) | (col.r);\n");
+				WRITE(p, "      col = uvec4(t3.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
+				WRITE(p, "      index3 = (col.a << 15) | (col.b << 10) | (col.g << 5) | (col.r);\n");
+				WRITE(p, "    }\n");
 				WRITE(p, "    break;\n");
 				WRITE(p, "  case 2:\n");  // 4444
 				WRITE(p, "    col = uvec4(t.rgba * vec4(15.99, 15.99, 15.99, 15.99));\n");
 				WRITE(p, "    index0 = (col.a << 12) | (col.b << 8) | (col.g << 4) | (col.r);\n");
+				WRITE(p, "    if (bilinear) {\n");
+				WRITE(p, "      col = uvec4(t1.rgba * vec4(15.99, 15.99, 15.99, 15.99));\n");
+				WRITE(p, "      index1 = (col.a << 12) | (col.b << 8) | (col.g << 4) | (col.r);\n");
+				WRITE(p, "      col = uvec4(t2.rgba * vec4(15.99, 15.99, 15.99, 15.99));\n");
+				WRITE(p, "      index2 = (col.a << 12) | (col.b << 8) | (col.g << 4) | (col.r);\n");
+				WRITE(p, "      col = uvec4(t3.rgba * vec4(15.99, 15.99, 15.99, 15.99));\n");
+				WRITE(p, "      index3 = (col.a << 12) | (col.b << 8) | (col.g << 4) | (col.r);\n");
+				WRITE(p, "    }\n");
 				WRITE(p, "    break;\n");
 				WRITE(p, "  case 3:\n");  // 8888
 				WRITE(p, "    col = uvec4(t.rgba * vec4(255.99, 255.99, 255.99, 255.99));\n");
 				WRITE(p, "    index0 = (col.a << 24) | (col.b << 16) | (col.g << 8) | (col.r);\n");
+				WRITE(p, "    if (bilinear) {\n");
+				WRITE(p, "      col = uvec4(t1.rgba * vec4(255.99, 255.99, 255.99, 255.99));\n");
+				WRITE(p, "      index1 = (col.a << 24) | (col.b << 16) | (col.g << 8) | (col.r);\n");
+				WRITE(p, "      col = uvec4(t2.rgba * vec4(255.99, 255.99, 255.99, 255.99));\n");
+				WRITE(p, "      index2 = (col.a << 24) | (col.b << 16) | (col.g << 8) | (col.r);\n");
+				WRITE(p, "      col = uvec4(t3.rgba * vec4(255.99, 255.99, 255.99, 255.99));\n");
+				WRITE(p, "      index3 = (col.a << 24) | (col.b << 16) | (col.g << 8) | (col.r);\n");
+				WRITE(p, "    }\n");
 				WRITE(p, "    break;\n");
 				WRITE(p, "  };\n");
 				WRITE(p, "  index0 = ((index0 >> depalShift) & depalMask) | depalOffset;\n");
 				WRITE(p, "  t = texelFetch(pal, ivec2(index0, 0), 0);\n");
+				WRITE(p, "  if (bilinear) {\n");
+				WRITE(p, "    index1 = ((index1 >> depalShift) & depalMask) | depalOffset;\n");
+				WRITE(p, "    index2 = ((index2 >> depalShift) & depalMask) | depalOffset;\n");
+				WRITE(p, "    index3 = ((index3 >> depalShift) & depalMask) | depalOffset;\n");
+				WRITE(p, "    t1 = texelFetch(pal, ivec2(index1, 0), 0);\n");
+				WRITE(p, "    t2 = texelFetch(pal, ivec2(index2, 0), 0);\n");
+				WRITE(p, "    t3 = texelFetch(pal, ivec2(index3, 0), 0);\n");
+				WRITE(p, "    t = mix(t, t1, fraction.x);\n");
+				WRITE(p, "    t2 = mix(t2, t3, fraction.x);\n");
+				WRITE(p, "    t = mix(t, t2, fraction.y);\n");
+				WRITE(p, "  }\n");
 			}
 
 			if (texFunc != GE_TEXFUNC_REPLACE || !doTextureAlpha)