Terrain holes data for custom shader

Hey,

Is there any public texture paint data we can acess for terrain holes in unity 2019.3 ? Like you can access the splatmap data with "_Control0". I'm making a custom terrain shader and would like to apply the holes data as an opacity mask.

Thanks for any help

 

Yes, it worked, thanks a lot : )

 

What worked? If you could provide a code example for the rest of us facing this issue it would certainly help

 

Instead of replying to a one-year-old thread, you could've just googled for

_TerrainHolesTexture

and eventually get the following results:

• https://github.com/TwoTailsGames/Un...master/CGIncludes/TerrainSplatmapCommon.cginc
  (^ also available from the Unity Download Archive)
  .
• https://twitter.com/harryalisavakis/status/1305843600186585088

 

I Googled the exact error I was getting with the keyword "_TerrainHolesTexture" and there was one. 1 result! on all of Google.

 

I was able to figure it out but not because I have a clue what is happening with my code I just brute force tried everything until it worked. And so I'm going to list it below with as much detail as I can so that in the future people can just copy the code. I have no idea what it does, because the documentation around Unity shaders is complete garbage with limited to no explanations.

In the shader file there's a function that looks like this

void surf(Input IN, inout SurfaceOutput o)
{
....

At the top of that function insert this:

#ifdef _ALPHATEST_ON
ClipHoles(IN.tc.xy);
#endif

Just above and outside the function you must insert this line of code (God knows what it does but it won't work without)
#pragma multi_compile_local __ _ALPHATEST_ON

In the Properties section at the top of the shader you must add this line below _Color

[HideInInspector] _TerrainHolesTexture ("Holes Map (RGB)", 2D) = "white" {}

All of this together will produce a terrain shader that has the desired effect of having holes.

 

Ohh and in the Tags, Category section make sure the Render Type is set to TransparentCutout


Category {
Tags {
"Queue" = "Transparent+1"
"RenderType" = "TransparentCutout"
}

 

Any way to give some guidance on how to apply this to vert frag shaders? Currently struggling adding it in. I've got the property set up along with declaring it. I've got the uv's also set up with the TEXCOORDs and everything, now I just don't understand how to implement it at the end:

float4 sample = tex2D (_Control, i.uv);

float4 splat0 = tex2D (_Splat0, i.uv2);
float4 splat1 = tex2D (_Splat1, i.uv3);
float4 splat2 = tex2D (_Splat2, i.uv4);
float4 splat3 = tex2D (_Splat3, i.uv5);

float hole = tex2D (_TerrainHolesTexture, i.uv7);
clip(hole == 0.0 ? -1:1);

float4 splats = splat0 * sample.r + splat1 * sample.g + splat2 * sample.b + splat3 * sample.a;

//--------------------------------------------------------------------------------------------

return (light + _AmbientColor + specular + rim) * _Color * splats;

I've tried replacing each splat in "splats" with hole and unfortunately all I get is a white texture, its not actually clipping a hole. Any help would be greatly appreciated!

 

Wow never mind I feel very stupid. For some reason when I tried to paint holes on my Terrain using my custom shader, it wouldn't work. So I thought that I would need to write a shader or c# code in order to make this work. Turns out that I don't and the reason it wasn't working was because of the brush I was using. The brush didn't have a bright white color to it and that's all it needed. lol smh

 

Excuse me,how to solve the problem of shadow generated by transparent objects