Lots of initial CThermalColdFilter implementation

Runtime/Graphics/CTextureBoo.cpp

@@ -7,7 +7,7 @@ namespace urde
 {
 static logvisor::Module Log("urde::CTextureBoo");
 
-/* GX uses this upsampling technique to prevent banding on downsampled texture formats */
+/* GX uses this upsampling technique to extract full 8-bit range */
 static inline uint8_t Convert3To8(uint8_t v)
 {
     /* Swizzle bits: 00000123 -> 12312312 */