fixes

src/main/java/me/cortex/voxy/client/iris/IrisShaderPatch.java

@@ -176,6 +176,14 @@ public class IrisShaderPatch {
         public float[] renderScale;
         public boolean useViewportDims;
         public boolean checkValid() {
+            if (this.blending != null) {
+                for (BlendState state : this.blending.values()) {
+                    if (state.buffer != -1 && (state.buffer<0||this.translucentDrawBuffers.length<=state.buffer)) {
+                        return false;
+                    }
+                }
+            }
+
             return this.opaqueDrawBuffers != null && this.translucentDrawBuffers != null && this.uniforms != null && this.opaquePatchData != null;
         }
     }
@@ -311,7 +319,7 @@ public class IrisShaderPatch {
             }
             patchData = GSON.fromJson(voxyPatchData, PatchGson.class);
             if (patchData == null) {
-                return null;
+                throw new IllegalStateException("Voxy patch json returned null");
             }
 
             {//Inject data from the auxilery files if they are present

src/main/java/me/cortex/voxy/client/mixin/minecraft/MixinGlDebug.java

@@ -8,6 +8,9 @@ import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
 
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
 @Mixin(GlDebug.class)
 public class MixinGlDebug {
     @WrapOperation(method = "onDebugMessage", at = @At(value = "INVOKE", target = "Lorg/slf4j/Logger;info(Ljava/lang/String;Ljava/lang/Object;)V", remap = false))
@@ -15,7 +18,7 @@ public class MixinGlDebug {
         if (msgObj instanceof GlDebug.DebugMessage msg) {
             var throwable = new Throwable(msg.toString());
             if (isCausedByVoxy(throwable.getStackTrace())) {
-                original.call(instance, base, throwable);
+                original.call(instance, base+"\n"+getStackTraceAsString(throwable), throwable);
             } else {
                 original.call(instance, base, msg);
             }
@@ -24,6 +27,14 @@ public class MixinGlDebug {
         }
     }
 
+    @Unique
+    private static String getStackTraceAsString(Throwable throwable) {
+        StringWriter sw = new StringWriter();
+        PrintWriter pw = new PrintWriter(sw);
+        throwable.printStackTrace(pw);
+        return sw.toString();
+    }
+
     @Unique
     private boolean isCausedByVoxy(StackTraceElement[] trace) {
         for (var elem : trace) {