Set material in code for a mesh but not affect all meshes with that material ?

xyz so there is no way to prototype with instnacing nodes manually using editor. Everything has to be preloaded in code then instnaced on _ready()? ....

kuligs2 You can instance manually, just reassign the references in code at startup or try not duplicating instances via ctrl D, but instead drag each new instance to the scene from the file system window. This is a known pitfall and can be worked around in various ways depending on your project's setup and preferred workflow. Tbh I thought someone already complained about it at Godot's github. This was also discussed at length here before, so search around.

xyz if you know what to search for then you can search for it. I dont, i just stumbled upon this issue so i asked why things not working the way they should. Many things that you do in the engine naturally have pitfalls it seems. Anyways, thanks for the info.

The more you know..

xyz but as you say, dragging from file browser on the scene tree works as it should. Materials/meshes are setting when i hover on with mouse and printouts give me different instance ID's. Wish ctrl + D did the same, instead of dragging with mouse. Maybe they could implement CTRL + Shift +D makes duplicate of the same instance and CTRL + D makes a new instance

Jesusemora this does not work.

Code that sets stuff on mouse over:

	if collider is Item:
		var mesh :MeshInstance3D = collider.item_mesh
		
		var material_count = mesh.get_surface_override_material_count()
		if is_mouse_entered:
			print(mesh)
			mesh.set_instance_shader_parameter("uniform",1.0)
			mesh.set_instance_shader_parameter("grow",0.05)
			mesh.set_instance_shader_parameter("albedo",Color.CHARTREUSE)
			
		else:
			mesh.set_instance_shader_parameter("uniform",0.0)
			mesh.set_instance_shader_parameter("grow",0.0)
			mesh.set_instance_shader_parameter("albedo",Color.BLACK)

shader code:

// NOTE: Shader automatically converted from Godot Engine 4.2.1.stable's StandardMaterial3D.

shader_type spatial;
render_mode blend_mix,depth_draw_opaque,cull_back,diffuse_burley,specular_schlick_ggx;
uniform vec4 albedo : source_color;
uniform sampler2D texture_albedo : source_color,filter_linear_mipmap,repeat_enable;
uniform float point_size : hint_range(0,128);
uniform float roughness : hint_range(0,1);
uniform sampler2D texture_metallic : hint_default_white,filter_linear_mipmap,repeat_enable;
uniform vec4 metallic_texture_channel;
uniform sampler2D texture_roughness : hint_roughness_r,filter_linear_mipmap,repeat_enable;
uniform float specular;
uniform float metallic;
uniform vec3 uv1_scale;
uniform vec3 uv1_offset;
uniform vec3 uv2_scale;
uniform vec3 uv2_offset;


instance uniform float grow = 0.0;

void vertex() {
	UV=UV*uv1_scale.xy+uv1_offset.xy;
}






void fragment() {
	vec2 base_uv = UV;
	vec4 albedo_tex = texture(texture_albedo,base_uv);
	ALBEDO = albedo.rgb * albedo_tex.rgb;
	float metallic_tex = dot(texture(texture_metallic,base_uv),metallic_texture_channel);
	METALLIC = metallic_tex * metallic;
	vec4 roughness_texture_channel = vec4(1.0,0.0,0.0,0.0);
	float roughness_tex = dot(texture(texture_roughness,base_uv),roughness_texture_channel);
	ROUGHNESS = roughness_tex * roughness;
	SPECULAR = specular;
}

Jesusemora
you mean albedo in shader?

it was already defined so i removed it otherwise it errors out

kuligs2 // NOTE: Shader automatically converted from Godot Engine 4.2.1.stable's StandardMaterial3D.

shader_type spatial;
render_mode blend_mix,depth_draw_opaque,cull_back,diffuse_burley,specular_schlick_ggx;
uniform vec4 albedo : source_color; <-----------------------------------------------------------------------------
uniform sampler2D texture_albedo : source_color,filter_linear_mipmap,repeat_enable;
uniform float point_size : hint_range(0,128);
uniform float roughness : hint_range(0,1);
uniform sampler2D texture_metallic : hint_default_white,filter_linear_mipmap,repeat_enable;
uniform vec4 metallic_texture_channel;
uniform sampler2D texture_roughness : hint_roughness_r,filter_linear_mipmap,repeat_enable;
uniform float specular;
uniform float metallic;
uniform vec3 uv1_scale;
uniform vec3 uv1_offset;
uniform vec3 uv2_scale;
uniform vec3 uv2_offset;