Specular for translucent material

General Feedback & Requests
1

Please fix the specular for translucent surfaces material! Right now it does not work!

2

I wrote something similar in the answershub a day ago and I absolutely support that. This is crucial. And I was surprised this is not possible at the moment.

Is it not possible to render the translucent material in a separate forward render pass? I really have no idea.

4

Well, then just fix it, at least, for forward rendering. :wink: It is better than nothing.

6

A bit of trolling :smiley: http://gyazo.com/82f24d94b7effe29284d4c99a4cdfcdf

If you really need specular on your surface, you can use a fake method with manual light vector calculation.

7

How did you make that?

8

I’ve just defined LightVector as parameter, set it to approximate sun position, and calc specular based on Phong model.

P.S. - can show source if you need.

9

Please. :slight_smile:

10

I’ve separated specular calculation here: Screenshot - 9bb0925c909e94096a90e4f59b2b86a2 - Gyazo

HLSL code for custom node:


float3 reflected_eye_to_pixel_vector;
float specular_factor;

reflected_eye_to_pixel_vector=-pixel_to_eye_vector+2*dot(pixel_to_eye_vector,microbump_normal)*microbump_normal;
specular_factor=fresnel_factor*pow(max(0,dot(pixel_to_light_vector,reflected_eye_to_pixel_vector)),SpecularPower);

return specular_factor;
11

The specular calculation is pretty easy to do manually for point and directional lights, and there are quite a few variations, but it’s a pain that you have to pass it in as a set of parameters (meaning it’s basically dynamic, and handling multiple lights or large scenes is a complete ball-ache).

12

For a ocean water, just having the Sun it is good enough.

Thanks for sharing it.