Is there any way to control how much reflection (render texture opacity?) is placed on a water plane with the Reflective/Refractive water? The water looks mirror like at the moment, which is not exactly what I’m looking for.
Thanks,
Jeff
The amount of reflection vs. refraction depending on the viewing angle is controlled with the fresnel texture. Edit it as you like.
So white=reflection black=refraction as far as I can tell, is this correct? I can’t find the description of this in the manual.
Thanks
Jeff
OK part of the problem before was that I didn’t have anything below the water so adjusting the alpha texture didn’t seem to do much. The results are much more obvious now. However I would still like more detailed documentation on HOW the alpha is interpreted. How is the specific alpha for a given angle determined?
Jeff
You can see it in the water shader code (look for “fresnel”). Note that water is nothing magic, it’s just shaders, textures and scripts that are included in standard assets. Anyone could write a completely different water implementation, or tweak existing ones.
Basically, a dot product is taken between view direction and “wave normal”. The dot product essentially returns the cosine of the angle between the two. It approaches 1 when looking straight down onto the water; and 0 when looking along the water surface.
This value is used to lookup into the Fresnel texture. The looked up alpha value interpolates between refraction and reflection.
So in general the fresnel texture should have bright alpha on the left side and dark alpha on the right side, with anything that “looks good” in between.