Shader's problem

Development Rendering
1

Hi,

I’ve been learning shaders lately. I have a shader in unreal that I need to “convert” to unity. Due to a few problems I started checking basic nodes. And here new problems appeared :slight_smile:
Same operation, subtract, gives me different result for different engines.
If I subtract position in unity, I get different result on preview than without subtracting.

Unity_Base
Unity_Base1065×533 43.9 KB

Unity_Subtract
Unity_Subtract1236×543 45.7 KB

But when I’m doing it in unreal, preview is the same in both cases.
Unreal_Base
Unreal_Base1151×620 122 KB

Unreal_Subtract
Unreal_Subtract1324×605 208 KB

Am I doing something wrong or why are the results not the same? I do not mean the exact shade of the colors, but the arrangement of “quarters” of colors on the sphere.

2

It may look that way but it isn’t the same. You’ve subtracted two tenths of a centimeter from the X and Y coordinates.

Unity’s base unit is a meter. Unreal’s base unit is a centimeter. Meaning “0.2” in Unreal is 2 millimeters while in Unity it is 20 centimeters.

3

Ok, that explains a bit. I didn’t think about the different base unit size in engines. Thanks a lot!