diff --git a/.github/gles.patch b/.github/gles.patch
index 5a922fcf2..c5cdb7d41 100644
--- a/.github/gles.patch
+++ b/.github/gles.patch
@@ -21,7 +21,7 @@ index 990e2f80..2e7842ac 100644
  
  void main() {
 diff --git a/src/host_shaders/opengl_fragment_shader.frag b/src/host_shaders/opengl_fragment_shader.frag
-index b9f9fe4c..f1cf286f 100644
+index 9f07df0b..2ab623af 100644
 --- a/src/host_shaders/opengl_fragment_shader.frag
 +++ b/src/host_shaders/opengl_fragment_shader.frag
 @@ -1,4 +1,5 @@
@@ -31,6 +31,17 @@ index b9f9fe4c..f1cf286f 100644
  
  in vec4 v_quaternion;
  in vec4 v_colour;
+@@ -41,8 +42,8 @@ vec3 normal;
+ const uint samplerEnabledBitfields[2] = uint[2](0x7170e645u, 0x7f013fefu);
+ 
+ bool isSamplerEnabled(uint environment_id, uint lut_id) {
+-	uint index = 7 * environment_id + lut_id;
+-	uint arrayIndex = (index >> 5);
++	uint index = 7u * environment_id + lut_id;
++	uint arrayIndex = (index >> 5u);
+ 	return (samplerEnabledBitfields[arrayIndex] & (1u << (index & 31u))) != 0u;
+ }
+ 
 @@ -166,11 +167,17 @@ float lutLookup(uint lut, int index) {
  	return texelFetch(u_tex_luts, ivec2(index, int(lut)), 0).r;
  }
@@ -50,6 +61,15 @@ index b9f9fe4c..f1cf286f 100644
  }
  
  // Convert an arbitrary-width floating point literal to an f32
+@@ -201,7 +208,7 @@ float lightLutLookup(uint environment_id, uint lut_id, uint light_id, vec3 light
+ 		// These are the spotlight attenuation LUTs
+ 		bit_in_config1 = 8 + int(light_id & 7u);
+ 		lut_index = 8u + light_id;
+-	} else if (lut_id <= 6) {
++	} else if (lut_id <= 6u) {
+ 		bit_in_config1 = 16 + int(lut_id);
+ 		lut_index = lut_id;
+ 	} else {
 @@ -210,16 +217,16 @@ float lightLutLookup(uint environment_id, uint lut_id, uint light_id, vec3 light
  
  	bool current_sampler_enabled = isSamplerEnabled(environment_id, lut_id); // 7 luts per environment
@@ -70,19 +90,16 @@ index b9f9fe4c..f1cf286f 100644
  	switch (input_id) {
  		case 0u: {
  			delta = dot(normal, normalize(half_vector));
-@@ -241,11 +248,11 @@ float lightLutLookup(uint environment_id, uint lut_id, uint light_id, vec3 light
- 			int GPUREG_LIGHTi_SPOTDIR_LOW = int(readPicaReg(0x0146u + (light_id << 4u)));
- 			int GPUREG_LIGHTi_SPOTDIR_HIGH = int(readPicaReg(0x0147u + (light_id << 4u)));
+@@ -243,9 +250,9 @@ float lightLutLookup(uint environment_id, uint lut_id, uint light_id, vec3 light
  
--			// Sign extend them. Normally bitfieldExtract would do that but it's missing on some versions
-+			// Sign extend them. Normally bitfieldExtractCompat would do that but it's missing on some versions
+ 			// Sign extend them. Normally bitfieldExtract would do that but it's missing on some versions
  			// of GLSL so we do it manually
 -			int se_x = bitfieldExtract(GPUREG_LIGHTi_SPOTDIR_LOW, 0, 13);
 -			int se_y = bitfieldExtract(GPUREG_LIGHTi_SPOTDIR_LOW, 16, 13);
 -			int se_z = bitfieldExtract(GPUREG_LIGHTi_SPOTDIR_HIGH, 0, 13);
-+			int se_x = bitfieldExtractCompat(GPUREG_LIGHTi_SPOTDIR_LOW, 0, 13);
-+			int se_y = bitfieldExtractCompat(GPUREG_LIGHTi_SPOTDIR_LOW, 16, 13);
-+			int se_z = bitfieldExtractCompat(GPUREG_LIGHTi_SPOTDIR_HIGH, 0, 13);
++			int se_x = bitfieldExtract(uint(GPUREG_LIGHTi_SPOTDIR_LOW), 0, 13);
++			int se_y = bitfieldExtract(uint(GPUREG_LIGHTi_SPOTDIR_LOW), 16, 13);
++			int se_z = bitfieldExtract(uint(GPUREG_LIGHTi_SPOTDIR_HIGH), 0, 13);
  
  			if ((se_x & 0x1000) == 0x1000) se_x |= 0xffffe000;
  			if ((se_y & 0x1000) == 0x1000) se_y |= 0xffffe000;
@@ -225,10 +242,10 @@ index 057f9a88..dc735ced 100644
  	v_quaternion = a_quaternion;
  }
 diff --git a/third_party/opengl/opengl.hpp b/third_party/opengl/opengl.hpp
-index 4a08650a..21af37e3 100644
+index 607815fa..cbfcc096 100644
 --- a/third_party/opengl/opengl.hpp
 +++ b/third_party/opengl/opengl.hpp
-@@ -583,22 +583,22 @@ namespace OpenGL {
+@@ -602,22 +602,22 @@ namespace OpenGL {
  	static void disableScissor() { glDisable(GL_SCISSOR_TEST); }
  	static void enableBlend() { glEnable(GL_BLEND); }
  	static void disableBlend() { glDisable(GL_BLEND); }
diff --git a/src/core/PICA/shader_gen_glsl.cpp b/src/core/PICA/shader_gen_glsl.cpp
index 60887d56b..aa605dd24 100644
--- a/src/core/PICA/shader_gen_glsl.cpp
+++ b/src/core/PICA/shader_gen_glsl.cpp
@@ -44,6 +44,7 @@ std::string FragmentGenerator::getDefaultVertexShader() {
 	if (api == API::GLES) {
 		ret += R"(
 			#define USING_GLES 1
+			#define fma(a, b, c) ((a) * (b) + (c))
 
 			precision mediump int;
 			precision mediump float;