UE4 & UE5 performance optimization

Unreal Engine running slow? Find the bottleneck. Fix the frame time.

Rendrify helps game developers and studios diagnose and resolve Unreal Engine performance issues, from stuttering and GPU bottlenecks to costly rendering passes. Every engagement focuses on measurable, documented improvements.

  • UE4 & UE5
  • NDA-friendly
  • Direct technical expertise
  • Measured results

01 / Evidence

One frame, before and after an optimization pass.

Frame time, 0 to 20 ms60 fps budget 16.6 ms
The hatched segment is the 1.6 ms that pushed every frame past the 60 fps budget. Rendrify works in frame time rather than frame rate, because averages hide the spikes players feel.

Selected clients & projects

Retained client since 2023

"We've collaborated on multiple high volume projects with demanding render requirements, and they've been a reliable force every time. Fast, efficient, and technically sharp. They consistently optimized our pipeline without sacrificing visual fidelity. Their speed and problem-solving made a huge impact."

Hivemind Ltd · three years of retained technical support

02 / Specialization

The problems Rendrify is brought in for.

Performance only. No gameplay or feature programming, so the attention stays on where your frame time goes.

  1. 01

    GPU and rendering bottlenecks

    Expensive passes, overdraw, shadows, post processing and materials that eat the GPU budget.

  2. 02

    Game Thread and CPU cost

    Tick, Blueprint, animation, physics and draw-call submission holding the frame back.

  3. 03

    Stutter and frame-time spikes

    Hitches, traversal stutter and the spikes an average FPS counter hides.

  4. 04

    Shader compilation and PSO stalls

    First-use hitches in packaged builds and gaps in precaching.

  5. 05

    Lumen and Nanite cost

    Understanding what UE5 features actually cost on your target hardware, and scaling them.

  6. 06

    VRAM and memory pressure

    Texture budgets, streaming pool pressure and assets heavier than they need to be.

  7. 07

    Streaming and loading

    Level streaming, World Partition and load-time hitches.

  8. 08

    Packaged build regressions

    Builds that run worse than the editor, and regressions between versions.

03 / Services

Clear starting points. Scope in writing.

Start with a diagnosis, or go straight to fixes if the problem is already understood. Full service details

Performance Audit

$950

Find the main performance bottlenecks before committing to fixes.

  • Up to 6 to 8 hours of specialist investigation
  • Prioritized technical findings report
  • Recommended next steps

Core implementation service

Optimization Sprint

Starting at $3,500

Profiling and hands-on optimization for the fixes that matter most.

  • Agreed priority fixes
  • Before/after validation where measurable
  • Documentation and handover

Ongoing Performance Support

Recurring technical support for live products and existing clients, within an agreed monthly scope: up to 8 specialist hours at entry level, with response terms and task boundaries set in writing. Larger engagements are quoted individually.

Starting at $1,200/month

Discuss Ongoing Support

Prices in USD, excluding applicable taxes. Every engagement starts with a written scope.

04 / Process

How an engagement runs.

  1. 01

    Describe the problem

    Share the symptoms, target platform, engine version and any deadline. A short message is enough to start.

  2. 02

    Agree a written scope

    You get a recommended next step and a written scope with price before any profiling begins.

  3. 03

    Measure and prioritize

    Profiling on agreed builds and hardware. Findings are ranked by measured cost, not guesswork.

  4. 04

    Fix, validate, hand over

    For implementation work: agreed fixes, before/after validation where measurable and documentation.

05 / Who you work with

Direct access to the person doing the work.

I'm Lucas Karlsson, the technical artist behind Rendrify. I work directly with developers to diagnose and resolve Unreal Engine performance problems.

No account managers or handoffs. The person who reads your first message is the one who profiles your build and explains the findings.

About Rendrify and Lucas
Operated by
Render Technologies AB, Sweden
Engines
Unreal Engine 4 and 5
Focus
Performance only
Confidentiality
NDA-friendly

07 / Questions

Frequently asked questions.

Is the first inquiry a free performance analysis?

No. The first message is a conversation about your problem, target hardware and goals. I reply with the most suitable next step. Any actual profiling happens inside a written, paid scope, which is usually a Performance Audit.

Will you sign an NDA?

Yes. Rendrify is NDA-friendly, and most engagements run under one. Project details, numbers and builds stay confidential unless a client approves publication.

Which engine versions do you work with?

Unreal Engine 4 and Unreal Engine 5, including Lumen, Nanite, virtual shadow maps and the profiling tooling that ships with each version.

Can you guarantee a specific frame rate?

No, and you should be careful with anyone who does before profiling your project. What Rendrify commits to is measurement: identifying where frame time goes, prioritizing by measured cost and validating changes before and after wherever the result can be measured.

Do you do gameplay or feature programming?

No. That is a deliberate line. The work is performance: rendering, CPU and GPU cost, stutter, memory and streaming. If the problem turns out not to be a performance one, I will say so.

Who actually does the work?

I do. Rendrify is founder-led, so the person profiling your project is the same person you talk to. There is no account manager relaying messages.

How is pricing set?

The Performance Audit is a fixed price for a defined scope. Sprints, release work and ongoing support have starting prices, with final effort and deliverables set in a written scope. Prices are in USD, excluding applicable taxes.

08 / Contact

Tell Rendrify about your Unreal project.

Describe the performance problem in a few sentences. Lucas reads every message and replies with a suggested next step. No calendar booking required.

Required: name, email and description. Details are stored securely and sent to Lucas to answer your inquiry. See the privacy notice. Please do not include passwords, access keys or confidential build files.