The texture i make in Photoshop turns out different In-Engine. A picture is better than any explanation, I just want it to look the same as when I import it.
Any help is appreciated.
The engine compresses textures to reduce the file size
Use appropriate filtering on your texture in UE4
You can set what sort of compression the engine uses by double-clicking on a texture in the content browser and changing it in the properties on the right. You may want to opt for RGBA uncompressed if you absolutely must have a texture pixel perfect, but I recommend using this sparingly or on low-res art as the memory required to store such textures is several magnitudes higher than their compressed equivalents.
Several magnitudes is bit over estimate. DXT1 is 1/8 compression and DXT5 is 1/4.