Fix bake export

armorpaint/sources/render_path_paint.ts

@@ -669,6 +669,20 @@ function render_path_paint_is_rt_bake(): bool {
 }
 ///end
 
+function render_path_paint_update_bake_layer(bits: texture_bits_t) {
+	// Use RGBA128 texture format for high poly to low poly baking to prevent artifacts
+	// Existing undo layers are used during the baking process for now
+	if (base_bits_handle.position != texture_bits_t.BITS32) {
+		base_bits_handle.position = bits;
+		slot_layer_resize_and_set_bits(context_raw.layer);
+		for (let i: i32 = 0; i < history_undo_layers.length; ++i) {
+			let l: slot_layer_t = history_undo_layers[i];
+			slot_layer_resize_and_set_bits(l);
+		}
+		base_bits_handle.position = texture_bits_t.BITS8;
+	}
+}
+
 function render_path_paint_draw() {
 	if (!render_path_paint_paint_enabled()) {
 		return;
@@ -693,10 +707,7 @@ function render_path_paint_draw() {
 			if (context_raw.bake_type == bake_type_t.NORMAL || context_raw.bake_type == bake_type_t.HEIGHT || context_raw.bake_type == bake_type_t.DERIVATIVE) {
 				if (!render_path_paint_baking && context_raw.pdirty > 0) {
 
-					// Use RGBA128 texture format for high poly to low poly baking to prevent artifacts
-					// Existing undo layers are used during the baking process for now
-					base_bits_handle.position = texture_bits_t.BITS32;
-					layers_set_bits();
+					render_path_paint_update_bake_layer(texture_bits_t.BITS32);
 
 					render_path_paint_baking = true;
 					_render_path_paint_bake_type = context_raw.bake_type;