Setting a chromakey in material

[MarkMurillo]

I have a simple filament mat definition but can't seem to get the pixel to be transparent above a certain threshold. It has similar logic to how I'm doing it in my open GL shader but i'm pretty sure I'm calling the wrong methods...or setting the wrong configurations...

Here is my material definition:

material {
    name : textured,
    shadingModel : unlit,
    blending : transparent,
    transparency : twoPassesTwoSides,
    parameters : [
        {
            type : sampler2d,
            name : texture
        },
        {
            type : float4,
            name : chromaKey
        }
    ],
    requires : [
        uv0
    ]
}
fragment {
    void material(inout MaterialInputs material) {
        prepareMaterial(material);
        material.baseColor = texture(materialParams_texture, getUV0());

        // Check for rgb thresholds.

        // Check for red
        if (materialParams.chromaKey.r >= -1.0f) {
            if (material.baseColor.r > materialParams.chromaKey.r
            && material.baseColor.g < materialParams.chromaKey.g
            && material.baseColor.b < materialParams.chromaKey.b) {
                // Discard
                discard;
            }
        }

        // Check for green
        if (materialParams.chromaKey.g >= -1.0f) {
            if (material.baseColor.r < materialParams.chromaKey.r
            && material.baseColor.g > materialParams.chromaKey.g
            && material.baseColor.b < materialParams.chromaKey.b) {
                // Discard
                discard;
            }
        }

        // Check for blue
        if (materialParams.chromaKey.b >= -1.0f) {
            if (material.baseColor.r < materialParams.chromaKey.r
            && material.baseColor.g < materialParams.chromaKey.g
            && material.baseColor.b > materialParams.chromaKey.b) {
                // Discard
                discard;
            }
        }

        // Check for alpha
        if (materialParams.chromaKey.a == 0.0f) {
            // Discard
            discard;
        }
    }
}

[MarkMurillo]

Figured it out...changed the blending mode to masked and updated the logic a bit.

material {
    name : textured,
    shadingModel : unlit,
    blending : masked,
    maskThreshold : 0.5,
    parameters : [
        {
            type : sampler2d,
            name : texture
        },
        {
            type : float3,
            name : chromaKey
        }
    ],
    requires : [
        uv0
    ]
}
fragment {
    void material(inout MaterialInputs material) {
        prepareMaterial(material);
        material.baseColor = texture(materialParams_texture, getUV0());

        // Check for rgb thresholds.

        // Check for red
        if (materialParams.chromaKey.x >= -1.0f) {
            if (material.baseColor.r > materialParams.chromaKey.x
            && material.baseColor.g < materialParams.chromaKey.x
            && material.baseColor.b < materialParams.chromaKey.x) {
                // Discard
                material.baseColor = vec4(0.0, 0.0, 0.0, 0.0);
            }
        }

        // Check for green
        if (materialParams.chromaKey.y >= -1.0f) {
            if (material.baseColor.r < materialParams.chromaKey.y
            && material.baseColor.g > materialParams.chromaKey.y
            && material.baseColor.b < materialParams.chromaKey.y) {
                // Discard
                material.baseColor = vec4(0.0, 0.0, 0.0, 0.0);
            }
        }

        // Check for blue
        if (materialParams.chromaKey.z >= -1.0f) {
            if (material.baseColor.r < materialParams.chromaKey.z
            && material.baseColor.g < materialParams.chromaKey.z
            && material.baseColor.b > materialParams.chromaKey.z) {
                // Discard
                material.baseColor = vec4(0.0, 0.0, 0.0, 0.0);
            }
        }
    }
}