Generate mipmaps for colormap, and set filtering

src/shaders/main.glsl

@@ -28,7 +28,6 @@ uniform int _region_map[256];
 uniform vec2 _region_offsets[256];
 uniform sampler2DArray _height_maps : repeat_disable;
 uniform usampler2DArray _control_maps : repeat_disable;
-uniform sampler2DArray _color_maps : source_color, repeat_disable;
 //INSERT: TEXTURE_SAMPLERS_NEAREST
 //INSERT: TEXTURE_SAMPLERS_LINEAR
 uniform float _texture_uv_scale_array[32];

src/shaders/uniforms.glsl

@@ -3,13 +3,15 @@
 R"(
 
 //INSERT: TEXTURE_SAMPLERS_LINEAR
+uniform sampler2DArray _color_maps : source_color, filter_linear_mipmap_anisotropic, repeat_disable;
 uniform sampler2DArray _texture_array_albedo : source_color, filter_linear_mipmap_anisotropic, repeat_enable;
 uniform sampler2DArray _texture_array_normal : hint_normal, filter_linear_mipmap_anisotropic, repeat_enable;
 uniform sampler2D noise_texture : source_color, filter_linear_mipmap_anisotropic, repeat_enable;
 
 //INSERT: TEXTURE_SAMPLERS_NEAREST
+uniform sampler2DArray _color_maps : source_color, filter_nearest_mipmap_anisotropic, repeat_disable;
 uniform sampler2DArray _texture_array_albedo : source_color, filter_nearest_mipmap_anisotropic, repeat_enable;
 uniform sampler2DArray _texture_array_normal : hint_normal, filter_nearest_mipmap_anisotropic, repeat_enable;
-uniform sampler2D noise_texture : source_color, filter_nearest, repeat_enable;
+uniform sampler2D noise_texture : source_color, filter_nearest_mipmap_anisotropic, repeat_enable;
 
 )"

src/terrain_3d_storage.cpp

@@ -239,6 +239,12 @@ void Terrain3DStorage::update_regions(bool force_emit) {
 
 	if (_generated_color_maps.is_dirty()) {
 		LOG(DEBUG_CONT, "Regenerating color layered texture from ", _color_maps.size(), " maps");
+		for (int i = 0; i < _color_maps.size(); i++) {
+			Ref<Image> map = _color_maps[i];
+			if (!map->has_mipmaps()) {
+				map->generate_mipmaps();
+			}
+		}
 		_generated_color_maps.create(_color_maps);
 		force_emit = true;
 		_modified = true;