Shader, sampler2D updates doesnt work

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1

Godot Version

v4.2.1.stable.official [b09f793f5]

Question

Hello. I have a problem with updating uniform sampler2D shader in godot. What im doing, Im drawing Image pixels, in print() section I see that image been updated, but visual doesnt update. What could be the problem? My function for updating sampler2D:

mask_texture.set_pixel(x, y, Color.BLACK)
print("UPDATE: ", mask_texture.get_data())  # this print changes of image
material.set_shader_parameter("mask_tex", mask_texture)  # but it doesnt update

Fragment shader:

float mask = texture(mask_tex, UV).r - 0.5;
mask = smoothstep(blend_amount, blend_amount + 0.1, mask);
ALBEDO = mix(base_albedo, blend_albedo, mask);
2

Is your mask_texture of type Image? No, you should be using the ImageTexture type. Use ImageTexture.create_from_image(image) to convert the type.

1 Like
3

I’ve encountered a similar predicament where set_shader_parameter fails to throw an error for incorrect parameter types, costing me an entire afternoon to track down the issue`(>﹏<)′

4

I tried to use Image to ImageTexture conversion and still have no result. Idk why

5

Check your shader code. As a debugging step, try commenting out other parts of the shader and focus solely on observing whether the Mask is functioning correctly.

6

Shader was fine. It works fine after adjustments. Thanks for helping

7

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