Getting consistent aliens is really hard. Got some images I really liked so made a alien LORA where the aliens will looks at least pretty close like they came from the same race. It's pretty flexible and handles specific details if you want.

Suggested Strength: 0.6-0.9 Lower more flexible for your added details. Higher more in line with the source images.

Trigger Word:

xenoassault, alien

Example Prompt:

masterpiece, best quality, ultra detailed, 8k raw photo, photorealistic, film grain, (35mm lens (xenoassault:1.3), large yellow eyes with pinhole pupils, (alien penis:0.8), realistic alien in combat armor, battle damaged, (holding a plasma rifle:1), war-torn battlefield, epic composition, ultra detailed, science fiction

Basic / Strength Tests

1. xenoassault, monster, alien, male, highly detailed realistic alien creature, muscular humanoid body, smooth dark exoskeleton, glowing eyes, standing in a laboratory, cinematic lighting, photorealistic, 8k

2. xenoassault, monster, alien, male, close-up portrait of a menacing realistic alien, sharp teeth, biomechanical details, wet glistening skin, dramatic rim lighting, ultra realistic, photoreal

Pose & Body Tests

1. (xenoassault:1.4), monster, alien, male, full body, realistic alien warrior crouching aggressively, powerful legs, long claws, spines along back, misty alien jungle background, dynamic angle, photorealistic, sharp focus

2. (xenoassault), solo, monster, alien, male, side view, tall imposing alien standing upright, broad shoulders, elongated head, textured carapace, dark sci-fi corridor, volumetric lighting, ultra detailed

3. xenoassault, monster, alien, male, dynamic action pose, leaping towards camera with claws extended, muscular limbs, biomechanical armor plates, motion blur, cinematic, photorealistic

Environment & Atmosphere Tests

1. xenoassault, monster, alien, male, realistic alien lurking in shadows of a derelict spaceship, red emergency lighting, fog, detailed exoskeleton, terrifying presence, horror atmosphere, 8k

2. xenoassault, monster, alien, male, alien standing on an alien planet surface at night, multiple moons in sky, bioluminescent flora, atmospheric haze, photorealistic, national geographic style

3. xenoassault, monster, alien, male, extreme close-up of alien face (examining a human skull:1.35), dripping saliva, sharp fangs, intense stare, dark moody lighting, hyper realistic

Variations & Creative Tests

1. xenoassault, monster, alien, male, realistic alien in combat armor, battle damaged, blood splatter, holding a plasma rifle, war-torn battlefield, epic composition, ultra detailed

2. xenoassault, monster, alien, male, three-quarter view, elegant yet terrifying alien diplomat, ornate biomechanical crown, luxurious dark interior, soft dramatic lighting, photorealistic

Should handle lighting and various poses pretty well.

Keep in mind the style and context of the picture can impact how the alien looks. Horror vs Science Fiction, etc.

This race does like to rock out with it's cock out.