Mirror Portal

ROLE
Act as a senior professional photo retoucher, image editor, photographer, compositing artist, cinematic environment artist and AI image-editing specialist. Perform a controlled, production-quality transformation of the uploaded image. Treat the source photograph as the ground truth for the human subject, environment, composition, perspective, lighting and photographic characteristics.

EDIT
Add a large freestanding mirror-like portal naturally within the original scene. Inside the portal, reveal a visually striking alternate version of the same environment while preserving the original scene structure, perspective and recognizable landmarks. Keep the main human subject photorealistic and recognizable, and integrate the portal using physically believable reflections, depth, lighting, shadows and occlusion.

PRIMARY OBJECTIVE
Execute the requested "Mirror Portal Effect" convincingly and photorealistically. The finished image should initially read as the original real photograph, but with a physically present reflective portal revealing an alternate reality based on the same location.

The portal must feel three-dimensional and genuinely embedded within the photographed environment rather than appearing as a flat digital frame or unrelated image pasted onto the scene.

EDITING PRIORITY
1. Preserve the original human subject and recognizable identity.
2. Preserve the original environment and composition outside the portal.
3. Create a clearly visible, physically convincing mirror portal.
4. Show an alternate version of the same location inside the portal.
5. Maintain correct perspective, lighting, reflections, depth and occlusion.

PORTAL DESIGN
- Create one large, visually dominant portal positioned naturally within available space around the subject.
- Use a clean reflective mirror-like surface as the core portal.
- Give the portal an elegant organic or subtly sculptural perimeter rather than a generic rectangular picture frame.
- Keep the overall form coherent and intentional.
- The portal may use a vertical oval, softly irregular organic shape or similarly refined form when appropriate to the composition.
- Keep the portal large enough for the alternate environment inside it to be clearly visible.
- Give the portal believable physical thickness.
- Maintain realistic edges and material response.
- Keep the design premium and minimal rather than heavily ornamental.
- Do not create multiple portals.
- Do not turn the entire photograph into a portal.

ALTERNATE REALITY
- The portal must reveal an alternate interpretation of the same location visible in the source photograph.
- Preserve recognizable terrain, architecture, room geometry, horizon placement and major environmental landmarks.
- Maintain the same underlying spatial structure.
- Transform the atmosphere and environmental state enough that the alternate reality is immediately distinguishable from the original.
- Appropriate differences may include altered weather, season, vegetation state, environmental mood or a restrained surreal transformation.
- Keep the alternate environment photorealistic.
- Make the transformation visually striking but coherent.
- Do not replace the location with an unrelated landscape, city, room or fantasy world.
- Do not introduce random monuments, buildings or landmarks.
- The viewer should recognize that both sides represent two versions of the same physical place.

PORTAL VIEW & PERSPECTIVE
- Treat the portal as a genuine opening or impossible mirror into another version of the environment.
- Match the internal view to the original camera position.
- Maintain correct horizon alignment and vanishing-point relationships.
- Environmental features visible through the portal should correspond spatially with features outside it.
- Account for the portal's orientation relative to the camera.
- Do not render the alternate world as a flat front-facing image when the portal is positioned at an angle.
- Maintain believable depth beyond the portal surface.
- Prevent distorted or impossible perspective.

SUBJECT PRESERVATION
- Keep the main human subject fully photorealistic.
- Preserve exact recognizable facial identity.
- Preserve facial structure, skin tone, expression and apparent age.
- Preserve hairstyle, hair texture and facial hair.
- Preserve body proportions, anatomy and pose.
- Preserve clothing, footwear, jewelry and visible accessories.
- Preserve tattoos and other recognizable details.
- Do not transform the person into a fantasy character.
- Do not change the person's clothing to match the alternate reality.
- Do not unnecessarily relight or recolor the person.
- Do not duplicate the person unless physically required by a legitimate mirror reflection.

SUBJECT & PORTAL RELATIONSHIP
- Position the portal compositionally around or near the subject without unnecessarily obscuring them.
- Keep the subject's face clearly visible.
- Allow the subject to stand in front of the portal when appropriate.
- If the portal passes behind the subject, preserve precise occlusion around hair, shoulders, clothing and limbs.
- If part of the subject should legitimately appear reflected by the mirror-like surface, preserve exact identity, clothing and pose in that reflection.
- Keep reflected anatomy physically correct.
- Do not generate an independent person inside the portal.
- Do not create a different face or outfit in reflections.
- Do not make the subject appear duplicated unless required by optical geometry.

PORTAL MATERIAL
- Render the portal boundary as a physically believable premium material.
- Use restrained mirror-polished or reflective characteristics where appropriate.
- Reflect colors and light from the surrounding real environment.
- Use realistic highlights according to surface curvature.
- Maintain subtle material imperfections when needed for realism.
- Avoid plastic, cheap metallic, cartoon or game-like materials.
- Do not use excessive glowing edges.
- Do not surround the portal with neon unless naturally justified.
- The portal should remain visually striking through its impossible view rather than excessive VFX decoration.

LIGHTING & ENVIRONMENTAL INTEGRATION
- Match the original scene's light direction, intensity, softness and color temperature.
- Preserve the original lighting outside the portal.
- Allow the alternate environment to have its own coherent atmospheric state while remaining physically believable.
- Add subtle reflected light or color spill near the portal only when physically justified.
- Keep this spill restrained.
- Generate realistic contact shadows if the portal physically touches the ground.
- Use ambient occlusion at physical contact points.
- Reflect nearby environmental features on reflective portal surfaces where appropriate.
- Do not dramatically relight the entire photograph.
- Do not add artificial cinematic rim lighting to the human subject.

PHYSICAL PLACEMENT
- Place the portal convincingly within the three-dimensional geometry of the original environment.
- Establish believable scale relative to the subject.
- Respect floors, terrain, walls and surrounding objects.
- If freestanding, provide a visually plausible physical relationship with the supporting surface.
- Maintain correct contact shadows.
- Do not make the portal appear to float accidentally.
- Use correct foreground and background occlusion.
- Allow existing environmental objects to pass naturally in front of portions of the portal when depth requires it.
- Prevent impossible intersections with the subject or surrounding objects.

DEPTH & OCCLUSION
- Maintain a clear hierarchy between foreground objects, the subject, the portal and the background.
- Preserve fine hair boundaries when the portal appears behind the person's head.
- Maintain accurate clothing and limb edges.
- Use environmental occlusion to anchor the portal into the location.
- Match depth of field to the original photograph.
- Keep portal edges appropriately sharp according to their focal distance.
- Render the alternate environment with depth characteristics consistent with the source camera.
- Do not create halos or cutout outlines around the subject.

STRICT PRESERVATION RULES
- Do not change anything outside the portal unless required for physically believable integration.
- Preserve the original human identity exactly.
- Preserve the original pose, expression, hairstyle, clothing and accessories.
- Preserve the original environment outside the portal.
- Preserve existing architecture, furniture, terrain, vegetation and objects.
- Preserve the original crop, framing, camera position and aspect ratio.
- Preserve the original overall exposure and color grade.
- Do not remove existing objects merely to create space for the portal.
- Do not introduce unrelated people, animals, props, text or decorations.
- Do not convert the entire environment into the alternate reality.
- The mirror portal must be the only significant new element.

REALISM & INTEGRATION
- Match the source photograph's sharpness, grain, noise, compression and lens characteristics.
- Maintain realistic reflections and material response.
- Match depth of field according to portal placement.
- Maintain correct scale, perspective and environmental geometry.
- Ensure the alternate environment appears genuinely dimensional beyond the portal.
- Preserve natural photographic dynamic range.
- Keep compositing edges invisible.
- Avoid an obvious pasted-image appearance.
- Make the final effect look photographed rather than digitally assembled.

REFLECTION SAFETY
- Any true reflection of the human subject must preserve exact identity.
- Maintain correct left-right reflection behavior.
- Preserve clothing and accessories.
- Maintain anatomically correct hands, face and body.
- Do not create additional limbs or facial features.
- Do not show reflections that are geometrically impossible from the portal's angle.
- Environmental reflections must correspond to plausible surroundings.
- Distinguish clearly