Fix: Construct 3 Effect Shader Uniform Precision Loss on Mobile

Time-based shader effect shows visible stepping on mobile; smooth on desktop.

Declare highp

uniform highp float time;

Explicit precision. Mobile reads as float32; smoothness preserved.

Or split into multiple uniforms

If lowp is acceptable for most, isolate the precision-sensitive ones. Per-uniform precision is fine.

Test on real device

Browser desktop fakes mobile precision via emulation; real mobile is the actual test.

“Mobile shader precision is conservative by default. Override where it matters.”

If you author shaders for HTML5, the mobile precision audit is one-time work. Save it; reuse.

Related reading

• Fix: Construct3 Array From Json Loses Precision Large Numbers
• Fix: Construct3 Effect Shader Uniform Not Updated After Init
• Fix: Construct3 Effect Shader Uniform Not Passing Array
• Fix: Construct3 Effect Shader Not Rendering Mobile