diff --git a/engine-proto/gram-test/Engine.jl b/engine-proto/gram-test/Engine.jl
index 920b043..bedda00 100644
--- a/engine-proto/gram-test/Engine.jl
+++ b/engine-proto/gram-test/Engine.jl
@@ -39,7 +39,7 @@ rand_on_shell(shells::Array{<:Number}) = rand_on_shell(Random.default_rng(), she
 
 # === elements ===
 
-point(pos) = [pos; 1; dot(pos, pos)]
+point(pos) = [pos; -1; 0.25 * dot(pos, pos)]
 
 plane(normal, offset) = [normal; 0; offset]