Image upload errors

I have a couple more questions @tigroumeow , if you can help me:

First: Settings → File and Media

I left this option at its default setting, but I don’t really understand what it means. If you could explain it, I’d really appreciate it.

I already created an image, and I noticed that it was saved in the Media Library, so I’m confused about what this setting actually does.

This is what I currently have (default setting, screenshot):

https://ibb.co/WpvG6CXF

Should I keep the default setting? Should I choose only Media Library to follow WordPress best practices? What should I do? I’m asking because I already generated an image, and it appears to have been saved in the Media Library anyway.

Second – Settings → AI: Also, I’m using Google AI Studio. I added Google under Settings → AI.

After that, I enabled the Video module under Modules, but I didn’t notice anything special. I found the Video Generator in the top-right corner, but it doesn’t let me choose Google as the video generation provider. (Only Open AI – Sora)

By the way, I also can’t choose Nano Banana Pro or any other image model like that for image generation.

Hey @tigroumeow how are you again, so 2 question i have left.

Settings in Files & Media:

Ok, so for example, if Claude code build a website with the MCP connection and upload a photo, this setting apply to him as well? or this setting is only for the AI Engine chat for frontend? or backend as well?

Image Generation with AI Engine in the backend?

Its look like this setting is for frontend chat but i didnt understand if the apply to the MCP or image generation via the backend.

Webp option when generate images with AI Engine AI photo generator:

Its possible to generate AI images with your plugin and they will be generated as webp?

My problem is, if you generate a PNG and then convert it, is a problem. when the image generated, its go to the media library, and the image get a permalink, even if you delete the image, you still has the Permalink in the database. usually i tried to upload images 1 time and this is it, i avoid uploads garbage or duplication because even if i delete this images, is still has a permalink. so i be glad to hear if its possible.

Hey @tigroumeow hey again.

About the WebP images, I found a solution. You can use the native PHP GD extension for image processing. Claude Code created a snippet that converts the images when they’re generated by the tool or via MCP.

Before the images receive their permalink, the snippet converts them to WebP. Here’s the snippet:

<?php
// WebP-convert AI Engine image generations ONLY — manual/other uploads untouched.
// AI Engine bypasses the WP upload pipeline (file_put_contents + wp_insert_post) and
// calls wp_generate_attachment_metadata right after the write, BEFORE it returns the
// URL (MCP path) or shows the draft (admin-UI path) — so we convert inside that call
// and nothing ever sees a non-webp URL.
// Gate: post_type mwai_image (admin-UI generator) OR the ai_<uniqid>.<digits> filename
// AI Engine stamps on MCP generations — both impossible to hit via manual upload.
// Gemini ships JPEG bytes in .png names → imagecreatefromstring, never *frompng.
// Anonymous closure on purpose: named functions in a persistent snippet deadlock
// Code Engine's validator on update (self-collision).
// wp_unique_filename on the .webp target is CRITICAL: AI Engine's own uniqueness loop
// only guards the original .png name. Two drafts saved under the same filename would
// otherwise share one .webp — deleting/discarding one draft then 404s the other.

add_filter('wp_generate_attachment_metadata', function ($metadata, $attachment_id) {
    static $busy = false;
    if ($busy || !function_exists('imagewebp')) return $metadata;
    $file = get_attached_file($attachment_id);
    if (!$file || !file_exists($file)) return $metadata;
    if (!preg_match('/\.(png|jpe?g)$/i', $file)) return $metadata;
    $is_ai = get_post_type($attachment_id) === 'mwai_image'
        || preg_match('/^ai_[0-9a-f]{13,}\.\d+\./', basename($file));
    if (!$is_ai) return $metadata;
    $img = @imagecreatefromstring(file_get_contents($file));
    if (!$img) return $metadata;
    imagepalettetotruecolor($img);
    imagealphablending($img, false);
    imagesavealpha($img, true);
    $dir = dirname($file);
    $webp = $dir . '/' . wp_unique_filename($dir, preg_replace('/\.(png|jpe?g)$/i', '.webp', basename($file)));
    $ok = imagewebp($img, $webp, 82);
    imagedestroy($img);
    if (!$ok) return $metadata;
    // Remove the original and any sub-sizes generated before conversion.
    if (!empty($metadata['sizes'])) {
        foreach ($metadata['sizes'] as $size) {
            if (!empty($size['file'])) @unlink($dir . '/' . $size['file']);
        }
    }
    @unlink($file);
    update_attached_file($attachment_id, $webp);
    wp_update_post([
        'ID' => $attachment_id,
        'post_mime_type' => 'image/webp',
        'guid' => trailingslashit(dirname(get_post_field('guid', $attachment_id))) . basename($webp),
    ]);
    // Regenerate metadata + sub-sizes from the webp original ($busy guards recursion).
    $busy = true;
    $metadata = wp_generate_attachment_metadata($attachment_id, $webp);
    $busy = false;
    return $metadata;
}, 10, 2);

It’s actually working pretty well. I tested it, and if you want, you can add it to your plugin.

About the file system option, I see there are two categories:

• Uploaded by Users
• Generated by AI

I assume Generated by AI includes both images generated through MCP and images I generate manually using the AI Engine Image Generation tool.

However, Uploaded by Users confuses me a bit. Is this option referring to external users, or am I considered a “user” as well?

I’m an administrator using the tool from the WordPress backend, so I’m not sure what “Users” means in this context. Could you clarify whether it refers to:

• External users uploading files from the frontend, or
• Me, as an administrator, using the AI Engine Image Generation tool in the backend?

Now I have another problem I’m trying to solve.

First, I want to say I’m really sorry for sending so many messages and jumping between different topics.

As I mentioned before, I’m new to AI Engine and I’m exploring a lot of its features right now, so I apologize for constantly bothering you with these questions and issues.

Now, about the problem:

Image Generation can’t generate an image with a transparent background.

I’ve tried every prompt I can think of and multiple models (Google AI Studio and OpenAI API keys with different image models).

Nothing works. Every time I get a fake transparent background. For example:

https://ibb.co/DPPr2C9q
https://ibb.co/Tx0LqHMr
https://ibb.co/TB23tJXc

At first, I thought it might be caused by my new WebP conversion snippet, but I disabled it and the result was exactly the same.

Now I suspect your plugin may be stripping the alpha channel (native transparency). If that’s the case, it would be great if you could preserve it, because it’s extremely useful for creating images without backgrounds, such as 3D elements, icons, logos, and other website assets.

This is the prompt I used in your plugin:

3D roof shingle, ultra-high-quality photorealistic 3D render with realistic textures, subtle lighting, and a soft natural shadow. Isolated on a fully transparent background (alpha channel) with no white, black, gray, gradient, floor, or studio backdrop. The output must contain only the roof shingle and its shadow, with all surrounding pixels fully transparent. Suitable as a premium website asset.

I tried this prompt on ChatGPT (use model IMG-GPT2 like your plugin) and its work, it generate 3D with no background.

Please help

I found the problem you right, can do transparent only with gpt image 1.5

work perfect.

the only thing i didn’t understand is Uploaded by Users

So only the chatbot right?

for example:

1. If i generate image with AI Engine (not chatbot) it will not getting deleted after an hour?
2. If i generate image via MCP it will not getting deleted after an hour?
3. If i upload image via MCP it will not getting deleted after an hour?
4. If i upload image manually it will not getting deleted after an hour?

But,

If i use the chatbot and upload and image even in the admin, it will delete after an hour? (Uploaded by Users – definition)

i got it right?