- Added a check to allow shader storage buffers on GL 4.3 Intel drivers. It doesn't work if GLSL version is set to 4.0 and the feature activated via extension.

src/gl/shaders/gl_shader.cpp

@@ -97,7 +97,11 @@ bool FShader::Load(const char * name, const char * vert_prog_lump, const char *
 	}
 	else
 	{
+		// This differentiation is for Intel which do not seem to expose the full extension, even if marked as required.
+		if (gl.glslversion < 4.3f)
 			vp_comb = "#version 400 core\n#extension GL_ARB_shader_storage_buffer_object : require\n#define SHADER_STORAGE_LIGHTS\n";
+		else
+			vp_comb = "#version 430 core\n#define SHADER_STORAGE_LIGHTS\n";
 	}
 
 	if (gl.buffermethod == BM_DEFERRED)

src/gl/system/gl_interface.cpp

@@ -233,8 +233,8 @@ void gl_LoadExtensions()
 					// Recent drivers, GL 4.4 don't have this problem, these can easily be recognized by also supporting the GL_ARB_buffer_storage extension.
 					if (CheckExtension("GL_ARB_shader_storage_buffer_object"))
 					{
-						// Shader storage buffer objects are broken on current Intel drivers.
-						if (strstr(gl.vendorstring, "Intel") == NULL)
+						// Intel's GLSL compiler is a bit broken with extensions, so unlock the feature only if not on Intel or having GL 4.3.
+						if (strstr(gl.vendorstring, "Intel") == NULL || gl_version >= 4.3f)
 						{
 							gl.flags |= RFL_SHADER_STORAGE_BUFFER;
 						}